nixos/networkd: remove CriticalConnection= fields in favor of KeepConnection

Systemd upstream has deprecated CriticalConnection with v244 in favor of
KeepConnection as that seems to be more flexible:

  The CriticalConnection= setting in .network files is now deprecated,
  and replaced by a new KeepConfiguration= setting which allows more
  detailed configuration of the IP configuration to keep in place.

1 files changed, 10 insertions, 0 deletions

diff --git a/nixos/doc/manual/release-notes/rl-2009.xml b/nixos/doc/manual/release-notes/rl-2009.xml
index 1cf7c977eeb0..1b40a84be554 100644
--- a/nixos/doc/manual/release-notes/rl-2009.xml
+++ b/nixos/doc/manual/release-notes/rl-2009.xml
@@ -290,6 +290,16 @@ environment.systemPackages = [
      has been set to <literal>true</literal>.
     </para>
    </listitem>
+   <listitem>
+    <para>
+      The <literal>systemd-networkd</literal> option
+      <literal>systemd.network.networks.&lt;name&gt;.dhcp.CriticalConnection</literal>
+      has been removed following upstream systemd's deprecation of the same. It is recommended to use
+      <literal>systemd.network.networks.&lt;name&gt;.networkConfig.KeepConfiguration</literal> instead.
+      See <citerefentry><refentrytitle>systemd.network</refentrytitle>
+      <manvolnum>5</manvolnum></citerefentry> for details.
+    </para>
+   </listitem>
   </itemizedlist>
  </section>