openra: move old openra packages to the openra_2019 namespace

pkgs/games/openra_2019/engine.nix

@@ -17,7 +17,7 @@
 with lib;
 
 stdenv.mkDerivation (recursiveUpdate packageAttrs rec {
-  pname = "openra";
+  pname = "openra_2019";
   version = "${engine.name}-${engine.version}";
 
   src = engine.src;

pkgs/games/openra_2019/mod.nix

@@ -23,7 +23,7 @@ let
 # Based on: https://build.opensuse.org/package/show/home:fusion809/openra-ura
 in stdenv.mkDerivation (recursiveUpdate packageAttrs rec {
   name = "${pname}-${version}";
-  pname = "openra-${mod.name}";
+  pname = "openra_2019-${mod.name}";
   inherit (mod) version;
 
   srcs = [

pkgs/top-level/all-packages.nix

@@ -36944,9 +36944,9 @@ with pkgs;
 
   otto-matic = callPackage ../games/otto-matic { };
 
-  openraPackages = import ../games/openra pkgs.__splicedPackages;
+  openraPackages_2019 = import ../games/openra_2019 pkgs.__splicedPackages;
 
-  openra = openraPackages.engines.release;
+  openra_2019 = openraPackages_2019.engines.release;
 
   openrw = callPackage ../games/openrw {
     inherit (darwin.apple_sdk.frameworks) Cocoa OpenAL;