nixos/openldap: Add release-notes for OLC config

nixos/doc/manual/release-notes/rl-2103.xml

@@ -185,6 +185,14 @@
      which is the new stable release.  OpenAFS 1.6 was removed.
     </para>
    </listitem>
+   <listitem>
+    <para>
+      The <literal>openldap</literal> module now has support for OLC-style
+      configuration, users of the <literal>configDir</literal> option may wish
+      to migrate. If you continue to use <literal>configDir</literal>, ensure that
+      <literal>olcPidFile</literal> is set to <literal>/run/slapd/slapd.pid</literal>.
+    </para>
+   </listitem>
   </itemizedlist>
  </section>
 

nixos/modules/services/databases/openldap.nix

@@ -421,13 +421,7 @@ in {
           let oldValue = (getAttr old cfg);
           in if (isList oldValue) then "[ ${concatStringsSep " " oldValue} ]" else oldValue
         )}
-    '') deprecations)) ++ (optional (cfg.configDir != null && (versionOlder config.system.stateVersion "20.09")) ''
-      The attribute `services.openldap.settings` now exists, and may be more
-      useful than `services.openldap.configDir`. If you continue to use
-      `configDir`, ensure that `olcPidFile` is set to "/run/slapd/slapd.pid".
-
-      Set `system.stateVersion` to "20.09" or greater to silence this message.
-    '');
+    '') deprecations));
 
     assertions = [{
       assertion = !(cfg.rootpwFile != null && cfg.rootpw != null);