minecraftServers: init - move all minecraft-server versions into minecraftServers

pkgs/games/minecraft-server/default.nix pkgs/games/minecraft-servers/default.nix

···
 { callPackage, lib, javaPackages }:
-# if you add more versions make sure to add to all-packages.nix
 let
   versions = lib.importJSON ./versions.json;
 
   latestVersion = lib.last (builtins.sort lib.versionOlder (builtins.attrNames versions));
-  escapeVersion = builtins.replaceStrings [ "." ] [ "_" ];
+  escapeVersion = builtins.replaceStrings [ "." ] [ "-" ];
 
   getJavaVersion = v: (builtins.getAttr "openjdk${toString v}" javaPackages.compiler).headless;
 
   packages = lib.mapAttrs'
     (version: value: {
-      name = "minecraft-server_${escapeVersion version}";
+      name = "vanilla-${escapeVersion version}";
       value = callPackage ./derivation.nix {
         inherit (value) version url sha1;
         jre_headless = getJavaVersion (if value.javaVersion == null then 8 else value.javaVersion); # versions <= 1.6 will default to 8
···
     })
     versions;
 in
-packages // {
-  minecraft-server = builtins.getAttr "minecraft-server_${escapeVersion latestVersion}" packages;
-}
+lib.recurseIntoAttrs (
+  packages // {
+    vanilla = builtins.getAttr "vanilla-${escapeVersion latestVersion}" packages;
+  }
+)

pkgs/top-level/all-packages.nix

···
 
   minecraft = callPackage ../games/minecraft { };
 
-  inherit (import ../games/minecraft-server { inherit callPackage lib javaPackages; })
-    minecraft-server_1_2
-    minecraft-server_1_3
-    minecraft-server_1_4
-    minecraft-server_1_5
-    minecraft-server_1_6
-    minecraft-server_1_7
-    minecraft-server_1_8
-    minecraft-server_1_9
-    minecraft-server_1_10
-    minecraft-server_1_11
-    minecraft-server_1_12
-    minecraft-server_1_13
-    minecraft-server_1_14
-    minecraft-server_1_15
-    minecraft-server_1_16
-    minecraft-server_1_17
-    minecraft-server_1_18
-    minecraft-server;
+  minecraftServers = import ../games/minecraft-servers { inherit callPackage lib javaPackages; };
+  minecraft-server = minecraftServers.vanilla; # backwards compatibility
 
   moon-buggy = callPackage ../games/moon-buggy {};