lib: deprecate mkPackageOptionMD

lib/options.nix

@@ -220,10 +220,10 @@ rec {
           (if isList example then "${pkgsText}." + concatStringsSep "." example else example);
       });
 
-  /* Alias of mkPackageOption. Previously used to create options with markdown
-     documentation, which is no longer required.
+  /* Deprecated alias of mkPackageOption, to be removed in 25.05.
+     Previously used to create options with markdown documentation, which is no longer required.
   */
-  mkPackageOptionMD = mkPackageOption;
+  mkPackageOptionMD = lib.warn "mkPackageOptionMD is deprecated and will be removed in 25.05; please use mkPackageOption." mkPackageOption;
 
   /* This option accepts anything, but it does not produce any result.
 

nixos/doc/manual/release-notes/rl-2411.section.md

@@ -144,6 +144,8 @@
   not the `hare` package, should be added to `nativeBuildInputs` when building
   Hare programs.
 
+- [`lib.options.mkPackageOptionMD`](https://nixos.org/manual/nixpkgs/unstable#function-library-lib.options.mkPackageOptionMD) is now obsolete; use the identical [`lib.options.mkPackageOption`](https://nixos.org/manual/nixpkgs/unstable#function-library-lib.options.mkPackageOption) instead.
+
 - To facilitate dependency injection, the `imgui` package now builds a static archive using vcpkg' CMake rules.
   The derivation now installs "impl" headers selectively instead of by a wildcard.
   Use `imgui.src` if you just want to access the unpacked sources.