nixos/knot: add release notes and partial compatibility

nixos/doc/manual/release-notes/rl-2311.section.md

@@ -97,6 +97,8 @@
 
 - `pass` now does not contain `password-store.el`.  Users should get `password-store.el` from Emacs lisp package set `emacs.pkgs.password-store`.
 
+- `services.knot` now supports `.settings` from RFC42.  The change is not 100% compatible with the previous `.extraConfig`.
+
 - `mu` now does not install `mu4e` files by default.  Users should get `mu4e` from Emacs lisp package set `emacs.pkgs.mu4e`.
 
 - `mariadb` now defaults to `mariadb_1011` instead of `mariadb_106`, meaning the default version was upgraded from 10.6.x to 10.11.x. See the [upgrade notes](https://mariadb.com/kb/en/upgrading-from-mariadb-10-6-to-mariadb-10-11/) for potential issues.

nixos/modules/services/networking/knot.nix

@@ -188,6 +188,12 @@ in {
       };
     };
   };
+  imports = [
+    # Compatibility with NixOS 23.05.  At least partial, as it fails assert if used with keyFiles.
+    (mkChangedOptionModule [ "services" "knot" "extraConfig" ] [ "services" "knot" "settingsFile" ]
+      (config: pkgs.writeText "knot.conf" config.services.knot.extraConfig)
+    )
+  ];
 
   config = mkIf config.services.knot.enable {
     users.groups.knot = {};