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-rw-r--r--nixos/modules/misc/ids.nix2
-rw-r--r--nixos/modules/module-list.nix4
-rw-r--r--nixos/modules/programs/zsh/oh-my-zsh.nix16
-rw-r--r--nixos/modules/rename.nix3
-rw-r--r--nixos/modules/security/acme.nix10
-rw-r--r--nixos/modules/security/sudo.nix129
-rw-r--r--nixos/modules/security/wrappers/default.nix4
-rw-r--r--nixos/modules/services/audio/mopidy.nix14
-rw-r--r--nixos/modules/services/desktops/gnome3/chrome-gnome-shell.nix27
-rw-r--r--nixos/modules/services/hardware/amd-hybrid-graphics.nix46
-rw-r--r--nixos/modules/services/misc/matrix-synapse.nix18
-rw-r--r--nixos/modules/services/monitoring/netdata.nix54
-rw-r--r--nixos/modules/services/networking/dnscrypt-proxy.nix321
-rw-r--r--nixos/modules/services/networking/dnscrypt-proxy.xml69
-rw-r--r--nixos/modules/services/networking/dnscrypt-wrapper.nix10
-rw-r--r--nixos/modules/services/networking/kresd.nix21
-rw-r--r--nixos/modules/services/networking/mosquitto.nix14
-rw-r--r--nixos/modules/services/networking/openvpn.nix28
-rw-r--r--nixos/modules/services/networking/ssh/sshd.nix12
-rw-r--r--nixos/modules/services/search/elasticsearch.nix8
-rw-r--r--nixos/modules/services/web-servers/mighttpd2.nix132
-rw-r--r--nixos/modules/services/web-servers/tomcat.nix2
-rw-r--r--nixos/modules/services/x11/desktop-managers/mate.nix44
-rw-r--r--nixos/modules/services/x11/xserver.nix2
-rw-r--r--nixos/modules/virtualisation/ec2-amis.nix32
-rw-r--r--nixos/modules/virtualisation/google-compute-image.nix2
26 files changed, 908 insertions, 116 deletions
diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index c6440dd906fd..415be580e974 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -301,6 +301,7 @@
       pykms = 282;
       kodi = 283;
       restya-board = 284;
+      mighttpd2 = 285;
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 
@@ -570,6 +571,7 @@
       pykms = 282;
       kodi = 283;
       restya-board = 284;
+      mighttpd2 = 285;
 
       # When adding a gid, make sure it doesn't match an existing
       # uid. Users and groups with the same name should have equal
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 8846bf9e8b12..bb3abc256fc1 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -200,6 +200,7 @@
   ./services/desktops/dleyna-server.nix
   ./services/desktops/geoclue2.nix
   ./services/desktops/gnome3/at-spi2-core.nix
+  ./services/desktops/gnome3/chrome-gnome-shell.nix
   ./services/desktops/gnome3/evolution-data-server.nix
   ./services/desktops/gnome3/gnome-disks.nix
   ./services/desktops/gnome3/gnome-documents.nix
@@ -225,7 +226,6 @@
   ./services/games/terraria.nix
   ./services/hardware/acpid.nix
   ./services/hardware/actkbd.nix
-  ./services/hardware/amd-hybrid-graphics.nix
   ./services/hardware/bluetooth.nix
   ./services/hardware/brltty.nix
   ./services/hardware/freefall.nix
@@ -446,6 +446,7 @@
   ./services/networking/dhcpd.nix
   ./services/networking/dnscache.nix
   ./services/networking/dnschain.nix
+  ./services/networking/dnscrypt-proxy.nix
   ./services/networking/dnscrypt-wrapper.nix
   ./services/networking/dnsmasq.nix
   ./services/networking/ejabberd.nix
@@ -633,6 +634,7 @@
   ./services/web-servers/lighttpd/default.nix
   ./services/web-servers/lighttpd/gitweb.nix
   ./services/web-servers/lighttpd/inginious.nix
+  ./services/web-servers/mighttpd2.nix
   ./services/web-servers/minio.nix
   ./services/web-servers/nginx/default.nix
   ./services/web-servers/phpfpm/default.nix
diff --git a/nixos/modules/programs/zsh/oh-my-zsh.nix b/nixos/modules/programs/zsh/oh-my-zsh.nix
index 9077643c4440..b995d390b279 100644
--- a/nixos/modules/programs/zsh/oh-my-zsh.nix
+++ b/nixos/modules/programs/zsh/oh-my-zsh.nix
@@ -48,6 +48,15 @@ in
             Name of the theme to be used by oh-my-zsh.
           '';
         };
+
+        cacheDir = mkOption {
+          default = "$HOME/.cache/oh-my-zsh";
+          type = types.str;
+          description = ''
+            Cache directory to be used by `oh-my-zsh`.
+            Without this option it would default to the read-only nix store.
+          '';
+        };
       };
     };
 
@@ -74,6 +83,13 @@ in
           "ZSH_THEME=\"${cfg.theme}\""
         }
 
+        ${optionalString (cfg.cacheDir != null) ''
+          if [[ ! -d "${cfg.cacheDir}" ]]; then
+            mkdir -p "${cfg.cacheDir}"
+          fi
+          ZSH_CACHE_DIR=${cfg.cacheDir}
+        ''}
+
         source $ZSH/oh-my-zsh.sh
       '';
     };
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index cd6ae35c0d9f..562be13a3f64 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -89,9 +89,6 @@ with lib;
     # Tarsnap
     (mkRenamedOptionModule [ "services" "tarsnap" "config" ] [ "services" "tarsnap" "archives" ])
 
-    # dnscrypt-proxy
-    (mkRemovedOptionModule [ "services" "dnscrypt-proxy" "enable" ] "")
-
     # ibus
     (mkRenamedOptionModule [ "programs" "ibus" "plugins" ] [ "i18n" "inputMethod" "ibus" "engines" ])
 
diff --git a/nixos/modules/security/acme.nix b/nixos/modules/security/acme.nix
index fb011019f7f5..5940f471883c 100644
--- a/nixos/modules/security/acme.nix
+++ b/nixos/modules/security/acme.nix
@@ -139,6 +139,14 @@ in
         '';
       };
 
+      tosHash = mkOption {
+        type = types.string;
+        default = "cc88d8d9517f490191401e7b54e9ffd12a2b9082ec7a1d4cec6101f9f1647e7b";
+        description = ''
+          SHA256 of the Terms of Services document. This changes once in a while.
+        '';
+      };
+
       production = mkOption {
         type = types.bool;
         default = true;
@@ -188,7 +196,7 @@ in
                 domain = if data.domain != null then data.domain else cert;
                 cpath = "${cfg.directory}/${cert}";
                 rights = if data.allowKeysForGroup then "750" else "700";
-                cmdline = [ "-v" "-d" domain "--default_root" data.webroot "--valid_min" cfg.validMin ]
+                cmdline = [ "-v" "-d" domain "--default_root" data.webroot "--valid_min" cfg.validMin "--tos_sha256" cfg.tosHash ]
                           ++ optionals (data.email != null) [ "--email" data.email ]
                           ++ concatMap (p: [ "-f" p ]) data.plugins
                           ++ concatLists (mapAttrsToList (name: root: [ "-d" (if root == null then name else "${name}:${root}")]) data.extraDomains)
diff --git a/nixos/modules/security/sudo.nix b/nixos/modules/security/sudo.nix
index cfd0595e63b7..a57f14bb5ae1 100644
--- a/nixos/modules/security/sudo.nix
+++ b/nixos/modules/security/sudo.nix
@@ -8,6 +8,22 @@ let
 
   inherit (pkgs) sudo;
 
+  toUserString = user: if (isInt user) then "#${toString user}" else "${user}";
+  toGroupString = group: if (isInt group) then "%#${toString group}" else "%${group}";
+
+  toCommandOptionsString = options:
+    "${concatStringsSep ":" options}${optionalString (length options != 0) ":"} ";
+
+  toCommandsString = commands:
+    concatStringsSep ", " (
+      map (command:
+        if (isString command) then
+          command
+        else
+          "${toCommandOptionsString command.options}${command.command}"
+      ) commands
+    );
+
 in
 
 {
@@ -47,6 +63,97 @@ in
         '';
     };
 
+    security.sudo.extraRules = mkOption {
+      description = ''
+        Define specific rules to be in the <filename>sudoers</filename> file.
+      '';
+      default = [];
+      example = [
+        # Allow execution of any command by all users in group sudo,
+        # requiring a password.
+        { groups = [ "sudo" ]; commands = [ "ALL" ]; }
+
+        # Allow execution of "/home/root/secret.sh" by user `backup`, `database`
+        # and the group with GID `1006` without a password.
+        { users = [ "backup" ]; groups = [ 1006 ];
+          commands = [ { command = "/home/root/secret.sh"; options = [ "SETENV" "NOPASSWD" ]; } ]; }
+
+        # Allow all users of group `bar` to run two executables as user `foo`
+        # with arguments being pre-set.
+        { groups = [ "bar" ]; runAs = "foo";
+          commands =
+            [ "/home/baz/cmd1.sh hello-sudo"
+              { command = ''/home/baz/cmd2.sh ""''; options = [ "SETENV" ]; } ]; }
+      ];
+      type = with types; listOf (submodule {
+        options = {
+          users = mkOption {
+            type = with types; listOf (either string int);
+            description = ''
+              The usernames / UIDs this rule should apply for.
+            '';
+            default = [];
+          };
+
+          groups = mkOption {
+            type = with types; listOf (either string int);
+            description = ''
+              The groups / GIDs this rule should apply for.
+            '';
+            default = [];
+          };
+
+          host = mkOption {
+            type = types.string;
+            default = "ALL";
+            description = ''
+              For what host this rule should apply.
+            '';
+          };
+
+          runAs = mkOption {
+            type = with types; string;
+            default = "ALL:ALL";
+            description = ''
+              Under which user/group the specified command is allowed to run.
+
+              A user can be specified using just the username: <code>"foo"</code>.
+              It is also possible to specify a user/group combination using <code>"foo:bar"</code>
+              or to only allow running as a specific group with <code>":bar"</code>.
+            '';
+          };
+
+          commands = mkOption {
+            description = ''
+              The commands for which the rule should apply.
+            '';
+            type = with types; listOf (either string (submodule {
+
+              options = {
+                command = mkOption {
+                  type = with types; string;
+                  description = ''
+                    A command being either just a path to a binary to allow any arguments,
+                    the full command with arguments pre-set or with <code>""</code> used as the argument,
+                    not allowing arguments to the command at all.
+                  '';
+                };
+
+                options = mkOption {
+                  type = with types; listOf (enum [ "NOPASSWD" "PASSWD" "NOEXEC" "EXEC" "SETENV" "NOSETENV" "LOG_INPUT" "NOLOG_INPUT" "LOG_OUTPUT" "NOLOG_OUTPUT" ]);
+                  description = ''
+                    Options for running the command. Refer to the <a href="https://www.sudo.ws/man/1.7.10/sudoers.man.html">sudo manual</a>.
+                  '';
+                  default = [];
+                };
+              };
+
+            }));
+          };
+        };
+      });
+    };
+
     security.sudo.extraConfig = mkOption {
       type = types.lines;
       default = "";
@@ -61,10 +168,16 @@ in
 
   config = mkIf cfg.enable {
 
+    security.sudo.extraRules = [
+      { groups = [ "wheel" ];
+        commands = [ { command = "ALL"; options = (if cfg.wheelNeedsPassword then [ "SETENV" ] else [ "NOPASSWD" "SETENV" ]); } ];
+      }
+    ];
+
     security.sudo.configFile =
       ''
         # Don't edit this file. Set the NixOS options ‘security.sudo.configFile’
-        # or ‘security.sudo.extraConfig’ instead.
+        # or ‘security.sudo.extraRules’ instead.
 
         # Keep SSH_AUTH_SOCK so that pam_ssh_agent_auth.so can do its magic.
         Defaults env_keep+=SSH_AUTH_SOCK
@@ -72,8 +185,18 @@ in
         # "root" is allowed to do anything.
         root        ALL=(ALL:ALL) SETENV: ALL
 
-        # Users in the "wheel" group can do anything.
-        %wheel      ALL=(ALL:ALL) ${if cfg.wheelNeedsPassword then "" else "NOPASSWD: ALL, "}SETENV: ALL
+        # extraRules
+        ${concatStringsSep "\n" (
+          lists.flatten (
+            map (
+              rule: if (length rule.commands != 0) then [
+                (map (user: "${toUserString user}	${rule.host}=(${rule.runAs})	${toCommandsString rule.commands}") rule.users)
+                (map (group: "${toGroupString group}	${rule.host}=(${rule.runAs})	${toCommandsString rule.commands}") rule.groups)
+              ] else []
+            ) cfg.extraRules
+          )
+        )}
+
         ${cfg.extraConfig}
       '';
 
diff --git a/nixos/modules/security/wrappers/default.nix b/nixos/modules/security/wrappers/default.nix
index 1f64213accd4..77e4b2a616d8 100644
--- a/nixos/modules/security/wrappers/default.nix
+++ b/nixos/modules/security/wrappers/default.nix
@@ -17,7 +17,7 @@ let
     hardeningEnable = [ "pie" ];
     installPhase = ''
       mkdir -p $out/bin
-      gcc -Wall -O2 -DWRAPPER_DIR=\"${parentWrapperDir}\" \
+      $CC -Wall -O2 -DWRAPPER_DIR=\"${parentWrapperDir}\" \
           -lcap-ng -lcap ${./wrapper.c} -o $out/bin/security-wrapper
     '';
   };
@@ -79,7 +79,7 @@ let
                  ({ owner = "root";
                     group = "root";
                   } // s)
-          else if 
+          else if
              (s ? "setuid" && s.setuid) ||
              (s ? "setgid" && s.setgid) ||
              (s ? "permissions")
diff --git a/nixos/modules/services/audio/mopidy.nix b/nixos/modules/services/audio/mopidy.nix
index c0a0f0374294..52613d450b51 100644
--- a/nixos/modules/services/audio/mopidy.nix
+++ b/nixos/modules/services/audio/mopidy.nix
@@ -4,17 +4,22 @@ with pkgs;
 with lib;
 
 let
-
   uid = config.ids.uids.mopidy;
   gid = config.ids.gids.mopidy;
   cfg = config.services.mopidy;
 
   mopidyConf = writeText "mopidy.conf" cfg.configuration;
 
-  mopidyEnv = python.buildEnv.override {
-    extraLibs = [ mopidy ] ++ cfg.extensionPackages;
+  mopidyEnv = buildEnv {
+    name = "mopidy-with-extensions-${mopidy.version}";
+    paths = closePropagation cfg.extensionPackages;
+    pathsToLink = [ "/${python.sitePackages}" ];
+    buildInputs = [ makeWrapper ];
+    postBuild = ''
+      makeWrapper ${mopidy}/bin/mopidy $out/bin/mopidy \
+        --prefix PYTHONPATH : $out/${python.sitePackages}
+    '';
   };
-
 in {
 
   options = {
@@ -61,7 +66,6 @@ in {
 
   };
 
-
   ###### implementation
 
   config = mkIf cfg.enable {
diff --git a/nixos/modules/services/desktops/gnome3/chrome-gnome-shell.nix b/nixos/modules/services/desktops/gnome3/chrome-gnome-shell.nix
new file mode 100644
index 000000000000..2740a22c7ca0
--- /dev/null
+++ b/nixos/modules/services/desktops/gnome3/chrome-gnome-shell.nix
@@ -0,0 +1,27 @@
+# Chrome GNOME Shell native host connector.
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  ###### interface
+  options = {
+    services.gnome3.chrome-gnome-shell.enable = mkEnableOption ''
+      Chrome GNOME Shell native host connector, a DBus service
+      allowing to install GNOME Shell extensions from a web browser.
+    '';
+  };
+
+
+  ###### implementation
+  config = mkIf config.services.gnome3.chrome-gnome-shell.enable {
+    environment.etc = {
+      "chromium/native-messaging-hosts/org.gnome.chrome_gnome_shell.json".source = "${pkgs.chrome-gnome-shell}/etc/chromium/native-messaging-hosts/org.gnome.chrome_gnome_shell.json";
+      "opt/chrome/native-messaging-hosts/org.gnome.chrome_gnome_shell.json".source = "${pkgs.chrome-gnome-shell}/etc/opt/chrome/native-messaging-hosts/org.gnome.chrome_gnome_shell.json";
+    };
+
+    environment.systemPackages = [ pkgs.chrome-gnome-shell ];
+
+    services.dbus.packages = [ pkgs.chrome-gnome-shell ];
+  };
+}
diff --git a/nixos/modules/services/hardware/amd-hybrid-graphics.nix b/nixos/modules/services/hardware/amd-hybrid-graphics.nix
deleted file mode 100644
index b0f9ff56d1b2..000000000000
--- a/nixos/modules/services/hardware/amd-hybrid-graphics.nix
+++ /dev/null
@@ -1,46 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-{
-
-  ###### interface
-
-  options = {
-
-    hardware.amdHybridGraphics.disable = lib.mkOption {
-      default = false;
-      type = lib.types.bool;
-      description = ''
-        Completely disable the AMD graphics card and use the
-        integrated graphics processor instead.
-      '';
-    };
-
-  };
-
-
-  ###### implementation
-
-  config = lib.mkIf config.hardware.amdHybridGraphics.disable {
-    systemd.services."amd-hybrid-graphics" = {
-      path = [ pkgs.bash ];
-      description = "Disable AMD Card";
-      after = [ "sys-kernel-debug.mount" ];
-      before = [ "systemd-vconsole-setup.service" "display-manager.service" ];
-      requires = [ "sys-kernel-debug.mount" "vgaswitcheroo.path" ];
-      serviceConfig = {
-        Type = "oneshot";
-        RemainAfterExit = true;
-        ExecStart = "${pkgs.bash}/bin/sh -c 'echo -e \"IGD\\nOFF\" > /sys/kernel/debug/vgaswitcheroo/switch'";
-        ExecStop = "${pkgs.bash}/bin/sh -c 'echo ON >/sys/kernel/debug/vgaswitcheroo/switch'";
-      };
-    };
-    systemd.paths."vgaswitcheroo" = {
-      pathConfig = {
-        PathExists = "/sys/kernel/debug/vgaswitcheroo/switch";
-        Unit = "amd-hybrid-graphics.service";
-      };
-      wantedBy = ["multi-user.target"];
-    };
-  };
-
-}
diff --git a/nixos/modules/services/misc/matrix-synapse.nix b/nixos/modules/services/misc/matrix-synapse.nix
index 11463cf4500a..80979547d339 100644
--- a/nixos/modules/services/misc/matrix-synapse.nix
+++ b/nixos/modules/services/misc/matrix-synapse.nix
@@ -578,6 +578,18 @@ in {
           Extra config options for matrix-synapse.
         '';
       };
+      extraConfigFiles = mkOption {
+        type = types.listOf types.path;
+        default = [];
+        description = ''
+          Extra config files to include.
+
+          The configuration files will be included based on the command line
+          argument --config-path. This allows to configure secrets without
+          having to go through the Nix store, e.g. based on deployment keys if
+          NixOPS is in use.
+        '';
+      };
       logConfig = mkOption {
         type = types.lines;
         default = readFile ./matrix-synapse-log_config.yaml;
@@ -627,7 +639,11 @@ in {
         Group = "matrix-synapse";
         WorkingDirectory = cfg.dataDir;
         PermissionsStartOnly = true;
-        ExecStart = "${cfg.package}/bin/homeserver --config-path ${configFile} --keys-directory ${cfg.dataDir}";
+        ExecStart = ''
+          ${cfg.package}/bin/homeserver \
+            ${ concatMapStringsSep "\n  " (x: "--config-path ${x} \\") ([ configFile ] ++ cfg.extraConfigFiles) }
+            --keys-directory ${cfg.dataDir}
+        '';
         Restart = "on-failure";
       };
     };
diff --git a/nixos/modules/services/monitoring/netdata.nix b/nixos/modules/services/monitoring/netdata.nix
index e1fde4fc9500..d23b329eeb25 100644
--- a/nixos/modules/services/monitoring/netdata.nix
+++ b/nixos/modules/services/monitoring/netdata.nix
@@ -5,18 +5,25 @@ with lib;
 let
   cfg = config.services.netdata;
 
-  configFile = pkgs.writeText "netdata.conf" cfg.configText;
+  wrappedPlugins = pkgs.runCommand "wrapped-plugins" {} ''
+    mkdir -p $out/libexec/netdata/plugins.d
+    ln -s /run/wrappers/bin/apps.plugin $out/libexec/netdata/plugins.d/apps.plugin
+  '';
+
+  localConfig = {
+    global = {
+      "plugins directory" = "${wrappedPlugins}/libexec/netdata/plugins.d ${pkgs.netdata}/libexec/netdata/plugins.d";
+    };
+  };
+  mkConfig = generators.toINI {} (recursiveUpdate localConfig cfg.config);
+  configFile = pkgs.writeText "netdata.conf" (if cfg.configText != null then cfg.configText else mkConfig);
 
   defaultUser = "netdata";
 
 in {
   options = {
     services.netdata = {
-      enable = mkOption {
-        default = false;
-        type = types.bool;
-        description = "Whether to enable netdata monitoring.";
-      };
+      enable = mkEnableOption "netdata";
 
       user = mkOption {
         type = types.str;
@@ -31,9 +38,9 @@ in {
       };
 
       configText = mkOption {
-        type = types.lines;
-        default = "";
-        description = "netdata.conf configuration.";
+        type = types.nullOr types.lines;
+        description = "Verbatim netdata.conf, cannot be combined with config.";
+        default = null;
         example = ''
           [global]
           debug log = syslog
@@ -42,11 +49,29 @@ in {
         '';
       };
 
+      config = mkOption {
+        type = types.attrsOf types.attrs;
+        default = {};
+        description = "netdata.conf configuration as nix attributes. cannot be combined with configText.";
+        example = literalExample ''
+          global = {
+            "debug log" = "syslog";
+            "access log" = "syslog";
+            "error log" = "syslog";
+          };
+        '';
+        };
+      };
     };
-  };
 
   config = mkIf cfg.enable {
+    assertions =
+      [ { assertion = cfg.config != {} -> cfg.configText == null ;
+          message = "Cannot specify both config and configText";
+        }
+      ];
     systemd.services.netdata = {
+      path = with pkgs; [ gawk curl ];
       description = "Real time performance monitoring";
       after = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
@@ -66,6 +91,15 @@ in {
       };
     };
 
+    security.wrappers."apps.plugin" = {
+      source = "${pkgs.netdata}/libexec/netdata/plugins.d/apps.plugin";
+      capabilities = "cap_dac_read_search,cap_sys_ptrace+ep";
+      owner = cfg.user;
+      group = cfg.group;
+      permissions = "u+rx,g+rx,o-rwx";
+    };
+
+
     users.extraUsers = optional (cfg.user == defaultUser) {
       name = defaultUser;
     };
diff --git a/nixos/modules/services/networking/dnscrypt-proxy.nix b/nixos/modules/services/networking/dnscrypt-proxy.nix
new file mode 100644
index 000000000000..857657eea4db
--- /dev/null
+++ b/nixos/modules/services/networking/dnscrypt-proxy.nix
@@ -0,0 +1,321 @@
+{ config, lib, pkgs, ... }:
+with lib;
+
+let
+  cfg = config.services.dnscrypt-proxy;
+
+  stateDirectory = "/var/lib/dnscrypt-proxy";
+
+  # The minisign public key used to sign the upstream resolver list.
+  # This is somewhat more flexible than preloading the key as an
+  # embedded string.
+  upstreamResolverListPubKey = pkgs.fetchurl {
+    url = https://raw.githubusercontent.com/dyne/dnscrypt-proxy/master/minisign.pub;
+    sha256 = "18lnp8qr6ghfc2sd46nn1rhcpr324fqlvgsp4zaigw396cd7vnnh";
+  };
+
+  # Internal flag indicating whether the upstream resolver list is used.
+  useUpstreamResolverList = cfg.customResolver == null;
+
+  # The final local address.
+  localAddress = "${cfg.localAddress}:${toString cfg.localPort}";
+
+  # The final resolvers list path.
+  resolverList = "${stateDirectory}/dnscrypt-resolvers.csv";
+
+  # Build daemon command line
+
+  resolverArgs =
+    if (cfg.customResolver == null)
+      then
+        [ "-L ${resolverList}"
+          "-R ${cfg.resolverName}"
+        ]
+      else with cfg.customResolver;
+        [ "-N ${name}"
+          "-k ${key}"
+          "-r ${address}:${toString port}"
+        ];
+
+  daemonArgs =
+       [ "-a ${localAddress}" ]
+    ++ resolverArgs
+    ++ cfg.extraArgs;
+in
+
+{
+  meta = {
+    maintainers = with maintainers; [ joachifm ];
+    doc = ./dnscrypt-proxy.xml;
+  };
+
+  options = {
+    # Before adding another option, consider whether it could
+    # equally well be passed via extraArgs.
+
+    services.dnscrypt-proxy = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = "Whether to enable the DNSCrypt client proxy";
+      };
+
+      localAddress = mkOption {
+        default = "127.0.0.1";
+        type = types.str;
+        description = ''
+          Listen for DNS queries to relay on this address. The only reason to
+          change this from its default value is to proxy queries on behalf
+          of other machines (typically on the local network).
+        '';
+      };
+
+      localPort = mkOption {
+        default = 53;
+        type = types.int;
+        description = ''
+          Listen for DNS queries to relay on this port. The default value
+          assumes that the DNSCrypt proxy should relay DNS queries directly.
+          When running as a forwarder for another DNS client, set this option
+          to a different value; otherwise leave the default.
+        '';
+      };
+
+      resolverName = mkOption {
+        default = "random";
+        example = "dnscrypt.eu-nl";
+        type = types.nullOr types.str;
+        description = ''
+          The name of the DNSCrypt resolver to use, taken from
+          <filename>${resolverList}</filename>.  The default is to
+          pick a random non-logging resolver that supports DNSSEC.
+        '';
+      };
+
+      customResolver = mkOption {
+        default = null;
+        description = ''
+          Use an unlisted resolver (e.g., a private DNSCrypt provider). For
+          advanced users only. If specified, this option takes precedence.
+        '';
+        type = types.nullOr (types.submodule ({ ... }: { options = {
+          address = mkOption {
+            type = types.str;
+            description = "IP address";
+            example = "208.67.220.220";
+          };
+
+          port = mkOption {
+            type = types.int;
+            description = "Port";
+            default = 443;
+          };
+
+          name = mkOption {
+            type = types.str;
+            description = "Fully qualified domain name";
+            example = "2.dnscrypt-cert.example.com";
+          };
+
+          key = mkOption {
+            type = types.str;
+            description = "Public key";
+            example = "B735:1140:206F:225D:3E2B:D822:D7FD:691E:A1C3:3CC8:D666:8D0C:BE04:BFAB:CA43:FB79";
+          };
+        }; }));
+      };
+
+      extraArgs = mkOption {
+        default = [];
+        type = types.listOf types.str;
+        description = ''
+          Additional command-line arguments passed verbatim to the daemon.
+          See <citerefentry><refentrytitle>dnscrypt-proxy</refentrytitle>
+          <manvolnum>8</manvolnum></citerefentry> for details.
+        '';
+        example = [ "-X libdcplugin_example_cache.so,--min-ttl=60" ];
+      };
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [{
+    assertions = [
+      { assertion = (cfg.customResolver != null) || (cfg.resolverName != null);
+        message   = "please configure upstream DNSCrypt resolver";
+      }
+    ];
+
+    users.users.dnscrypt-proxy = {
+      description = "dnscrypt-proxy daemon user";
+      isSystemUser = true;
+      group = "dnscrypt-proxy";
+    };
+    users.groups.dnscrypt-proxy = {};
+
+    systemd.sockets.dnscrypt-proxy = {
+      description = "dnscrypt-proxy listening socket";
+      documentation = [ "man:dnscrypt-proxy(8)" ];
+
+      wantedBy = [ "sockets.target" ];
+
+      socketConfig = {
+        ListenStream = localAddress;
+        ListenDatagram = localAddress;
+      };
+    };
+
+    systemd.services.dnscrypt-proxy = {
+      description = "dnscrypt-proxy daemon";
+      documentation = [ "man:dnscrypt-proxy(8)" ];
+
+      before = [ "nss-lookup.target" ];
+      after = [ "network.target" ];
+      requires = [ "dnscrypt-proxy.socket "];
+
+      serviceConfig = {
+        NonBlocking = "true";
+        ExecStart = "${pkgs.dnscrypt-proxy}/bin/dnscrypt-proxy ${toString daemonArgs}";
+        ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+
+        User = "dnscrypt-proxy";
+
+        PrivateTmp = true;
+        PrivateDevices = true;
+        ProtectHome = true;
+      };
+    };
+    }
+
+    (mkIf config.security.apparmor.enable {
+    systemd.services.dnscrypt-proxy.after = [ "apparmor.service" ];
+
+    security.apparmor.profiles = singleton (pkgs.writeText "apparmor-dnscrypt-proxy" ''
+      ${pkgs.dnscrypt-proxy}/bin/dnscrypt-proxy {
+        /dev/null rw,
+        /dev/urandom r,
+
+        /etc/passwd r,
+        /etc/group r,
+        ${config.environment.etc."nsswitch.conf".source} r,
+
+        ${getLib pkgs.glibc}/lib/*.so mr,
+        ${pkgs.tzdata}/share/zoneinfo/** r,
+
+        network inet stream,
+        network inet6 stream,
+        network inet dgram,
+        network inet6 dgram,
+
+        ${getLib pkgs.dnscrypt-proxy}/lib/dnscrypt-proxy/libdcplugin*.so mr,
+
+        ${getLib pkgs.gcc.cc}/lib/libssp.so.* mr,
+        ${getLib pkgs.libsodium}/lib/libsodium.so.* mr,
+        ${getLib pkgs.systemd}/lib/libsystemd.so.* mr,
+        ${getLib pkgs.xz}/lib/liblzma.so.* mr,
+        ${getLib pkgs.libgcrypt}/lib/libgcrypt.so.* mr,
+        ${getLib pkgs.libgpgerror}/lib/libgpg-error.so.* mr,
+        ${getLib pkgs.libcap}/lib/libcap.so.* mr,
+        ${getLib pkgs.lz4}/lib/liblz4.so.* mr,
+        ${getLib pkgs.attr}/lib/libattr.so.* mr, # */
+
+        ${resolverList} r,
+
+        /run/systemd/notify rw,
+      }
+    '');
+    })
+
+    (mkIf useUpstreamResolverList {
+    systemd.services.init-dnscrypt-proxy-statedir = {
+      description = "Initialize dnscrypt-proxy state directory";
+
+      wantedBy = [ "dnscrypt-proxy.service" ];
+      before = [ "dnscrypt-proxy.service" ];
+
+      script = ''
+        mkdir -pv ${stateDirectory}
+        chown -c dnscrypt-proxy:dnscrypt-proxy ${stateDirectory}
+        cp -uv \
+          ${pkgs.dnscrypt-proxy}/share/dnscrypt-proxy/dnscrypt-resolvers.csv \
+          ${stateDirectory}
+      '';
+
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+      };
+    };
+
+    systemd.services.update-dnscrypt-resolvers = {
+      description = "Update list of DNSCrypt resolvers";
+
+      requires = [ "init-dnscrypt-proxy-statedir.service" ];
+      after = [ "init-dnscrypt-proxy-statedir.service" ];
+
+      path = with pkgs; [ curl diffutils dnscrypt-proxy minisign ];
+      script = ''
+        cd ${stateDirectory}
+        domain=raw.githubusercontent.com
+        get="curl -fSs --resolve $domain:443:$(hostip -r 8.8.8.8 $domain | head -1)"
+        $get -o dnscrypt-resolvers.csv.tmp \
+          https://$domain/dyne/dnscrypt-proxy/master/dnscrypt-resolvers.csv
+        $get -o dnscrypt-resolvers.csv.minisig.tmp \
+          https://$domain/dyne/dnscrypt-proxy/master/dnscrypt-resolvers.csv.minisig
+        mv dnscrypt-resolvers.csv.minisig{.tmp,}
+        if ! minisign -q -V -p ${upstreamResolverListPubKey} \
+          -m dnscrypt-resolvers.csv.tmp -x dnscrypt-resolvers.csv.minisig ; then
+          echo "failed to verify resolver list!" >&2
+          exit 1
+        fi
+        [[ -f dnscrypt-resolvers.csv ]] && mv dnscrypt-resolvers.csv{,.old}
+        mv dnscrypt-resolvers.csv{.tmp,}
+        if cmp dnscrypt-resolvers.csv{,.old} ; then
+          echo "no change"
+        else
+          echo "resolver list updated"
+        fi
+      '';
+
+      serviceConfig = {
+        PrivateTmp = true;
+        PrivateDevices = true;
+        ProtectHome = true;
+        ProtectSystem = "strict";
+        ReadWritePaths = "${dirOf stateDirectory} ${stateDirectory}";
+        SystemCallFilter = "~@mount";
+      };
+    };
+
+    systemd.timers.update-dnscrypt-resolvers = {
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnBootSec = "5min";
+        OnUnitActiveSec = "6h";
+      };
+    };
+    })
+    ]);
+
+  imports = [
+    (mkRenamedOptionModule [ "services" "dnscrypt-proxy" "port" ] [ "services" "dnscrypt-proxy" "localPort" ])
+
+    (mkChangedOptionModule
+      [ "services" "dnscrypt-proxy" "tcpOnly" ]
+      [ "services" "dnscrypt-proxy" "extraArgs" ]
+      (config:
+        let val = getAttrFromPath [ "services" "dnscrypt-proxy" "tcpOnly" ] config; in
+        optional val "-T"))
+
+    (mkChangedOptionModule
+      [ "services" "dnscrypt-proxy" "ephemeralKeys" ]
+      [ "services" "dnscrypt-proxy" "extraArgs" ]
+      (config:
+        let val = getAttrFromPath [ "services" "dnscrypt-proxy" "ephemeralKeys" ] config; in
+        optional val "-E"))
+
+    (mkRemovedOptionModule [ "services" "dnscrypt-proxy" "resolverList" ] ''
+      The current resolver listing from upstream is always used
+      unless a custom resolver is specified.
+    '')
+  ];
+}
diff --git a/nixos/modules/services/networking/dnscrypt-proxy.xml b/nixos/modules/services/networking/dnscrypt-proxy.xml
new file mode 100644
index 000000000000..555c6df4d551
--- /dev/null
+++ b/nixos/modules/services/networking/dnscrypt-proxy.xml
@@ -0,0 +1,69 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="sec-dnscrypt-proxy">
+
+  <title>DNSCrypt client proxy</title>
+
+  <para>
+    The DNSCrypt client proxy relays DNS queries to a DNSCrypt enabled
+    upstream resolver. The traffic between the client and the upstream
+    resolver is encrypted and authenticated, mitigating the risk of MITM
+    attacks, DNS poisoning attacks, and third-party snooping (assuming the
+    upstream is trustworthy).
+  </para>
+
+  <sect1><title>Basic configuration</title>
+
+  <para>
+    To enable the client proxy, set
+    <programlisting>
+      services.dnscrypt-proxy.enable = true;
+    </programlisting>
+  </para>
+
+  <para>
+    Enabling the client proxy does not alter the system nameserver; to
+    relay local queries, prepend <literal>127.0.0.1</literal> to
+    <option>networking.nameservers</option>.
+  </para>
+
+  </sect1>
+
+  <sect1><title>As a forwarder for another DNS client</title>
+
+  <para>
+    To run the DNSCrypt proxy client as a forwarder for another
+    DNS client, change the default proxy listening port to a
+    non-standard value and point the other client to it:
+    <programlisting>
+      services.dnscrypt-proxy.localPort = 43;
+    </programlisting>
+  </para>
+
+  <sect2><title>dnsmasq</title>
+  <para>
+    <programlisting>
+      {
+        services.dnsmasq.enable = true;
+        services.dnsmasq.servers = [ "127.0.0.1#43" ];
+      }
+    </programlisting>
+  </para>
+  </sect2>
+
+  <sect2><title>unbound</title>
+  <para>
+    <programlisting>
+      {
+        services.unbound.enable = true;
+        services.unbound.forwardAddresses = [ "127.0.0.1@43" ];
+      }
+    </programlisting>
+  </para>
+  </sect2>
+
+  </sect1>
+
+</chapter>
diff --git a/nixos/modules/services/networking/dnscrypt-wrapper.nix b/nixos/modules/services/networking/dnscrypt-wrapper.nix
index 23cc92946e41..bf13d5c6f5fe 100644
--- a/nixos/modules/services/networking/dnscrypt-wrapper.nix
+++ b/nixos/modules/services/networking/dnscrypt-wrapper.nix
@@ -145,6 +145,16 @@ in {
     };
     users.groups.dnscrypt-wrapper = { };
 
+    security.polkit.extraConfig = ''
+      // Allow dnscrypt-wrapper user to restart dnscrypt-wrapper.service
+      polkit.addRule(function(action, subject) {
+          if (action.id == "org.freedesktop.systemd1.manage-units" &&
+              action.lookup("unit") == "dnscrypt-wrapper.service" &&
+              subject.user == "dnscrypt-wrapper") {
+              return polkit.Result.YES;
+          }
+        });
+    '';
 
     systemd.services.dnscrypt-wrapper = {
       description = "dnscrypt-wrapper daemon";
diff --git a/nixos/modules/services/networking/kresd.nix b/nixos/modules/services/networking/kresd.nix
index 18e2ab9aebf1..011a9b2f58ea 100644
--- a/nixos/modules/services/networking/kresd.nix
+++ b/nixos/modules/services/networking/kresd.nix
@@ -72,6 +72,7 @@ in
         (iface: if elem ":" (stringToCharacters iface) then "[${iface}]:53" else "${iface}:53")
         cfg.interfaces;
       socketConfig.ListenDatagram = listenStreams;
+      socketConfig.FreeBind = true;
     };
 
     systemd.sockets.kresd-control = rec {
@@ -82,20 +83,11 @@ in
       socketConfig = {
         FileDescriptorName = "control";
         Service = "kresd.service";
-        SocketMode = "0660"; # only root user/group may connect
+        SocketMode = "0660"; # only root user/group may connect and control kresd
       };
     };
 
-    # Create the cacheDir; tmpfiles don't work on nixos-rebuild switch.
-    systemd.services.kresd-cachedir = {
-      serviceConfig.Type = "oneshot";
-      script = ''
-        if [ ! -d '${cfg.cacheDir}' ]; then
-          mkdir -p '${cfg.cacheDir}'
-          chown kresd:kresd '${cfg.cacheDir}'
-        fi
-      '';
-    };
+    systemd.tmpfiles.rules = [ "d '${cfg.cacheDir}' 0770 kresd kresd - -" ];
 
     systemd.services.kresd = {
       description = "Knot-resolver daemon";
@@ -104,16 +96,15 @@ in
         User = "kresd";
         Type = "notify";
         WorkingDirectory = cfg.cacheDir;
+        Restart = "on-failure";
       };
 
       script = ''
         exec '${package}/bin/kresd' --config '${configFile}' \
-          -k '${cfg.cacheDir}/root.key'
+          -k '${pkgs.dns-root-data}/root.key'
       '';
 
-      after = [ "kresd-cachedir.service" ];
-      requires = [ "kresd.socket" "kresd-cachedir.service" ];
-      wantedBy = [ "sockets.target" ];
+      requires = [ "kresd.socket" ];
     };
   };
 }
diff --git a/nixos/modules/services/networking/mosquitto.nix b/nixos/modules/services/networking/mosquitto.nix
index 81915b5a2ef8..273ca797b98d 100644
--- a/nixos/modules/services/networking/mosquitto.nix
+++ b/nixos/modules/services/networking/mosquitto.nix
@@ -12,6 +12,10 @@ let
     keyfile ${cfg.ssl.keyfile}
   '';
 
+  passwordConf = optionalString cfg.checkPasswords ''
+    password_file ${cfg.dataDir}/passwd
+  '';
+
   mosquittoConf = pkgs.writeText "mosquitto.conf" ''
     pid_file /run/mosquitto/pid
     acl_file ${aclFile}
@@ -19,6 +23,7 @@ let
     allow_anonymous ${boolToString cfg.allowAnonymous}
     bind_address ${cfg.host}
     port ${toString cfg.port}
+    ${passwordConf}
     ${listenerConf}
     ${cfg.extraConf}
   '';
@@ -153,6 +158,15 @@ in
         '';
       };
 
+      checkPasswords = mkOption {
+        default = false;
+        example = true;
+        type = types.bool;
+        description = ''
+          Refuse connection when clients provide incorrect passwords.
+        '';
+      };
+
       extraConf = mkOption {
         default = "";
         type = types.lines;
diff --git a/nixos/modules/services/networking/openvpn.nix b/nixos/modules/services/networking/openvpn.nix
index 3fbf5a9f0227..7a96b673c51e 100644
--- a/nixos/modules/services/networking/openvpn.nix
+++ b/nixos/modules/services/networking/openvpn.nix
@@ -50,6 +50,11 @@ let
               "up ${pkgs.writeScript "openvpn-${name}-up" upScript}"}
           ${optionalString (cfg.down != "" || cfg.updateResolvConf)
               "down ${pkgs.writeScript "openvpn-${name}-down" downScript}"}
+          ${optionalString (cfg.authUserPass != null)
+              "auth-user-pass ${pkgs.writeText "openvpn-credentials-${name}" ''
+                ${cfg.authUserPass.username}
+                ${cfg.authUserPass.password}
+              ''}"}
         '';
 
     in {
@@ -161,6 +166,29 @@ in
             '';
           };
 
+          authUserPass = mkOption {
+            default = null;
+            description = ''
+              This option can be used to store the username / password credentials
+              with the "auth-user-pass" authentication method.
+
+              WARNING: Using this option will put the credentials WORLD-READABLE in the Nix store!
+            '';
+            type = types.nullOr (types.submodule {
+
+              options = {
+                username = mkOption {
+                  description = "The username to store inside the credentials file.";
+                  type = types.string;
+                };
+
+                password = mkOption {
+                  description = "The password to store inside the credentials file.";
+                  type = types.string;
+                };
+              };
+            });
+          };
         };
 
       });
diff --git a/nixos/modules/services/networking/ssh/sshd.nix b/nixos/modules/services/networking/ssh/sshd.nix
index aa9c0fa1c09f..d9b12d278160 100644
--- a/nixos/modules/services/networking/ssh/sshd.nix
+++ b/nixos/modules/services/networking/ssh/sshd.nix
@@ -21,7 +21,7 @@ let
           daemon reads in addition to the the user's authorized_keys file.
           You can combine the <literal>keys</literal> and
           <literal>keyFiles</literal> options.
-          Warning: If you are using <literal>NixOps</literal> then don't use this 
+          Warning: If you are using <literal>NixOps</literal> then don't use this
           option since it will replace the key required for deployment via ssh.
         '';
       };
@@ -137,6 +137,14 @@ in
         '';
       };
 
+      openFirewall = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to automatically open the specified ports in the firewall.
+        '';
+      };
+
       listenAddresses = mkOption {
         type = with types; listOf (submodule {
           options = {
@@ -302,7 +310,7 @@ in
 
       };
 
-    networking.firewall.allowedTCPPorts = cfg.ports;
+    networking.firewall.allowedTCPPorts = if cfg.openFirewall then cfg.ports else [];
 
     security.pam.services.sshd =
       { startSession = true;
diff --git a/nixos/modules/services/search/elasticsearch.nix b/nixos/modules/services/search/elasticsearch.nix
index c51dd5d94655..adef500b7b5c 100644
--- a/nixos/modules/services/search/elasticsearch.nix
+++ b/nixos/modules/services/search/elasticsearch.nix
@@ -6,6 +6,7 @@ let
   cfg = config.services.elasticsearch;
 
   es5 = builtins.compareVersions (builtins.parseDrvName cfg.package.name).version "5" >= 0;
+  es6 = builtins.compareVersions (builtins.parseDrvName cfg.package.name).version "6" >= 0;
 
   esConfig = ''
     network.host: ${cfg.listenAddress}
@@ -92,8 +93,6 @@ in {
         node.name: "elasticsearch"
         node.master: true
         node.data: false
-        index.number_of_shards: 5
-        index.number_of_replicas: 1
       '';
     };
 
@@ -165,7 +164,10 @@ in {
       path = [ pkgs.inetutils ];
       environment = {
         ES_HOME = cfg.dataDir;
-        ES_JAVA_OPTS = toString ([ "-Des.path.conf=${configDir}" ] ++ cfg.extraJavaOptions);
+        ES_JAVA_OPTS = toString ( optional (!es6) [ "-Des.path.conf=${configDir}" ]
+                                  ++ cfg.extraJavaOptions);
+      } // optionalAttrs es6 {
+        ES_PATH_CONF = configDir;
       };
       serviceConfig = {
         ExecStart = "${cfg.package}/bin/elasticsearch ${toString cfg.extraCmdLineOptions}";
diff --git a/nixos/modules/services/web-servers/mighttpd2.nix b/nixos/modules/services/web-servers/mighttpd2.nix
new file mode 100644
index 000000000000..a888f623616e
--- /dev/null
+++ b/nixos/modules/services/web-servers/mighttpd2.nix
@@ -0,0 +1,132 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.mighttpd2;
+  configFile = pkgs.writeText "mighty-config" cfg.config;
+  routingFile = pkgs.writeText "mighty-routing" cfg.routing;
+in {
+  options.services.mighttpd2 = {
+    enable = mkEnableOption "Mighttpd2 web server";
+
+    config = mkOption {
+      default = "";
+      example = ''
+        # Example configuration for Mighttpd 2
+        Port: 80
+        # IP address or "*"
+        Host: *
+        Debug_Mode: Yes # Yes or No
+        # If available, "nobody" is much more secure for User:.
+        User: root
+        # If available, "nobody" is much more secure for Group:.
+        Group: root
+        Pid_File: /var/run/mighty.pid
+        Logging: Yes # Yes or No
+        Log_File: /var/log/mighty # The directory must be writable by User:
+        Log_File_Size: 16777216 # bytes
+        Log_Backup_Number: 10
+        Index_File: index.html
+        Index_Cgi: index.cgi
+        Status_File_Dir: /usr/local/share/mighty/status
+        Connection_Timeout: 30 # seconds
+        Fd_Cache_Duration: 10 # seconds
+        # Server_Name: Mighttpd/3.x.y
+        Tls_Port: 443
+        Tls_Cert_File: cert.pem # should change this with an absolute path
+        # should change this with comma-separated absolute paths
+        Tls_Chain_Files: chain.pem
+        # Currently, Tls_Key_File must not be encrypted.
+        Tls_Key_File: privkey.pem # should change this with an absolute path
+        Service: 0 # 0 is HTTP only, 1 is HTTPS only, 2 is both
+      '';
+      type = types.lines;
+      description = ''
+        Verbatim config file to use
+        (see http://www.mew.org/~kazu/proj/mighttpd/en/config.html)
+      '';
+    };
+
+    routing = mkOption {
+      default = "";
+      example = ''
+        # Example routing for Mighttpd 2
+
+        # Domain lists
+        [localhost www.example.com]
+
+        # Entries are looked up in the specified order
+        # All paths must end with "/"
+
+        # A path to CGI scripts should be specified with "=>"
+        /~alice/cgi-bin/ => /home/alice/public_html/cgi-bin/
+
+        # A path to static files should be specified with "->"
+        /~alice/         -> /home/alice/public_html/
+        /cgi-bin/        => /export/cgi-bin/
+
+        # Reverse proxy rules should be specified with ">>"
+        # /path >> host:port/path2
+        # Either "host" or ":port" can be committed, but not both.
+        /app/cal/        >> example.net/calendar/
+        # Yesod app in the same server
+        /app/wiki/       >> 127.0.0.1:3000/
+
+        /                -> /export/www/
+      '';
+      type = types.lines;
+      description = ''
+        Verbatim routing file to use
+        (see http://www.mew.org/~kazu/proj/mighttpd/en/config.html)
+      '';
+    };
+
+    cores = mkOption {
+      default = null;
+      type = types.nullOr types.int;
+      description = ''
+        How many cores to use.
+        If null it will be determined automatically
+      '';
+    };
+
+  };
+
+  config = mkIf cfg.enable {
+    assertions =
+      [ { assertion = cfg.routing != "";
+          message = "You need at least one rule in mighttpd2.routing";
+        }
+      ];
+    systemd.services.mighttpd2 = {
+      description = "Mighttpd2 web server";
+      after = [ "network-online.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        ExecStart = ''
+          ${pkgs.haskellPackages.mighttpd2}/bin/mighty \
+            ${configFile} \
+            ${routingFile} \
+            +RTS -N${optionalString (cfg.cores != null) "${cfg.cores}"}
+        '';
+        Type = "simple";
+        User = "mighttpd2";
+        Group = "mighttpd2";
+        Restart = "on-failure";
+        AmbientCapabilities = "cap_net_bind_service";
+        CapabilityBoundingSet = "cap_net_bind_service";
+      };
+    };
+
+    users.extraUsers.mighttpd2 = {
+      group = "mighttpd2";
+      uid = config.ids.uids.mighttpd2;
+      isSystemUser = true;
+    };
+
+    users.extraGroups.mighttpd2.gid = config.ids.gids.mighttpd2;
+  };
+
+  meta.maintainers = with lib.maintainers; [ fgaz ];
+}
diff --git a/nixos/modules/services/web-servers/tomcat.nix b/nixos/modules/services/web-servers/tomcat.nix
index 943415e08c64..0b2e5c0b69d9 100644
--- a/nixos/modules/services/web-servers/tomcat.nix
+++ b/nixos/modules/services/web-servers/tomcat.nix
@@ -29,7 +29,7 @@ in
         type = types.package;
         default = pkgs.tomcat85;
         defaultText = "pkgs.tomcat85";
-        example = lib.literalExample "pkgs.tomcatUnstable";
+        example = lib.literalExample "pkgs.tomcat9";
         description = ''
           Which tomcat package to use.
         '';
diff --git a/nixos/modules/services/x11/desktop-managers/mate.nix b/nixos/modules/services/x11/desktop-managers/mate.nix
index 6ec56f2b1535..814503ab0bc4 100644
--- a/nixos/modules/services/x11/desktop-managers/mate.nix
+++ b/nixos/modules/services/x11/desktop-managers/mate.nix
@@ -12,6 +12,17 @@ let
     in
       filter (x: !(builtins.elem (pkgName x) ysNames)) xs;
 
+  addToXDGDirs = p: ''
+    if [ -d "${p}/share/gsettings-schemas/${p.name}" ]; then
+      export XDG_DATA_DIRS=$XDG_DATA_DIRS''${XDG_DATA_DIRS:+:}${p}/share/gsettings-schemas/${p.name}
+    fi
+
+    if [ -d "${p}/lib/girepository-1.0" ]; then
+      export GI_TYPELIB_PATH=$GI_TYPELIB_PATH''${GI_TYPELIB_PATH:+:}${p}/lib/girepository-1.0
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}${p}/lib
+    fi
+  '';
+
   xcfg = config.services.xserver;
   cfg = xcfg.desktopManager.mate;
 
@@ -20,10 +31,14 @@ in
 {
   options = {
 
-    services.xserver.desktopManager.mate.enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable the MATE desktop environment";
+    services.xserver.desktopManager.mate = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Enable the MATE desktop environment";
+      };
+
+      debug = mkEnableOption "mate-session debug messages";
     };
 
     environment.mate.excludePackages = mkOption {
@@ -52,10 +67,29 @@ in
         # Find the mouse
         export XCURSOR_PATH=~/.icons:${config.system.path}/share/icons
 
+        # Let caja find extensions
+        export CAJA_EXTENSION_DIRS=$CAJA_EXTENSION_DIRS''${CAJA_EXTENSION_DIRS:+:}${config.system.path}/lib/caja/extensions-2.0
+
+        # Let caja extensions find gsettings schemas
+        ${concatMapStrings (p: ''
+          if [ -d "${p}/lib/caja/extensions-2.0" ]; then
+            ${addToXDGDirs p}
+          fi
+          '')
+          config.environment.systemPackages
+        }
+
+        # Let mate-panel find applets
+        export MATE_PANEL_APPLETS_DIR=$MATE_PANEL_APPLETS_DIR''${MATE_PANEL_APPLETS_DIR:+:}${config.system.path}/share/mate-panel/applets
+        export MATE_PANEL_EXTRA_MODULES=$MATE_PANEL_EXTRA_MODULES''${MATE_PANEL_EXTRA_MODULES:+:}${config.system.path}/lib/mate-panel/applets
+
+        # Add mate-control-center paths to some XDG variables because its schemas are needed by mate-settings-daemon, and mate-settings-daemon is a dependency for mate-control-center (that is, they are mutually recursive)
+        ${addToXDGDirs pkgs.mate.mate-control-center}
+
         # Update user dirs as described in http://freedesktop.org/wiki/Software/xdg-user-dirs/
         ${pkgs.xdg-user-dirs}/bin/xdg-user-dirs-update
 
-        ${pkgs.mate.mate-session-manager}/bin/mate-session &
+        ${pkgs.mate.mate-session-manager}/bin/mate-session ${optionalString cfg.debug "--debug"} &
         waitPID=$!
       '';
     };
diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
index 7acd621f53ab..f96d3c5afbac 100644
--- a/nixos/modules/services/x11/xserver.nix
+++ b/nixos/modules/services/x11/xserver.nix
@@ -548,7 +548,7 @@ in
           knownVideoDrivers;
       in optional (driver != null) ({ inherit name; modules = []; driverName = name; } // driver));
 
-    nixpkgs.config.xorg = optionalAttrs (elem "vboxvideo" cfg.videoDrivers) { abiCompat = "1.18"; };
+    nixpkgs.config = optionalAttrs (elem "vboxvideo" cfg.videoDrivers) { xorg.abiCompat = "1.18"; };
 
     assertions = [
       { assertion = config.security.polkit.enable;
diff --git a/nixos/modules/virtualisation/ec2-amis.nix b/nixos/modules/virtualisation/ec2-amis.nix
index 44f00d7730be..01512911a057 100644
--- a/nixos/modules/virtualisation/ec2-amis.nix
+++ b/nixos/modules/virtualisation/ec2-amis.nix
@@ -223,22 +223,22 @@ let self = {
   "17.03".us-west-2.hvm-ebs = "ami-a93daac9";
   "17.03".us-west-2.hvm-s3 = "ami-5139ae31";
 
-  # 17.09.2356.cb751f9b1c3
-  "17.09".eu-west-1.hvm-ebs = "ami-d40185ad";
-  "17.09".eu-west-2.hvm-ebs = "ami-c5445da1";
-  "17.09".eu-west-3.hvm-ebs = "ami-2636815b";
-  "17.09".eu-central-1.hvm-ebs = "ami-e758d388";
-  "17.09".us-east-1.hvm-ebs = "ami-865327fc";
-  "17.09".us-east-2.hvm-ebs = "ami-074d6562";
-  "17.09".us-west-1.hvm-ebs = "ami-992c28f9";
-  "17.09".us-west-2.hvm-ebs = "ami-2bd87953";
-  "17.09".ca-central-1.hvm-ebs = "ami-c4bb01a0";
-  "17.09".ap-southeast-1.hvm-ebs = "ami-5ff79723";
-  "17.09".ap-southeast-2.hvm-ebs = "ami-57e71135";
-  "17.09".ap-northeast-1.hvm-ebs = "ami-5249c434";
-  "17.09".ap-northeast-2.hvm-ebs = "ami-f1288e9f";
-  "17.09".sa-east-1.hvm-ebs = "ami-5492d438";
-  "17.09".ap-south-1.hvm-ebs = "ami-c4fab2ab";
+  # 17.09.2681.59661f21be6
+  "17.09".eu-west-1.hvm-ebs = "ami-a30192da";
+  "17.09".eu-west-2.hvm-ebs = "ami-295a414d";
+  "17.09".eu-west-3.hvm-ebs = "ami-8c0eb9f1";
+  "17.09".eu-central-1.hvm-ebs = "ami-266cfe49";
+  "17.09".us-east-1.hvm-ebs = "ami-40bee63a";
+  "17.09".us-east-2.hvm-ebs = "ami-9d84aff8";
+  "17.09".us-west-1.hvm-ebs = "ami-d14142b1";
+  "17.09".us-west-2.hvm-ebs = "ami-3eb40346";
+  "17.09".ca-central-1.hvm-ebs = "ami-ca8207ae";
+  "17.09".ap-southeast-1.hvm-ebs = "ami-84bccff8";
+  "17.09".ap-southeast-2.hvm-ebs = "ami-0dc5386f";
+  "17.09".ap-northeast-1.hvm-ebs = "ami-89b921ef";
+  "17.09".ap-northeast-2.hvm-ebs = "ami-179b3b79";
+  "17.09".sa-east-1.hvm-ebs = "ami-4762202b";
+  "17.09".ap-south-1.hvm-ebs = "ami-4e376021";
 
   latest = self."17.09";
 }; in self
diff --git a/nixos/modules/virtualisation/google-compute-image.nix b/nixos/modules/virtualisation/google-compute-image.nix
index 75717e08ab2a..2fb38059b261 100644
--- a/nixos/modules/virtualisation/google-compute-image.nix
+++ b/nixos/modules/virtualisation/google-compute-image.nix
@@ -212,7 +212,7 @@ in
           echo "Obtaining SSH keys..."
           mkdir -m 0700 -p /root/.ssh
           AUTH_KEYS=$(${mktemp})
-          ${wget} -O $AUTH_KEYS http://metadata.google.internal/computeMetadata/v1/project/attributes/sshKeys
+          ${wget} -O $AUTH_KEYS --header="Metadata-Flavor: Google" http://metadata.google.internal/computeMetadata/v1/instance/attributes/sshKeys
           if [ -s $AUTH_KEYS ]; then
 
             # Read in key one by one, split in case Google decided