Fix gamerules in secondary worlds

nms-patches/CommandGamerule.patch

@@ -0,0 +1,20 @@
+--- a/net/minecraft/server/CommandGamerule.java
++++ b/net/minecraft/server/CommandGamerule.java
+@@ -29,7 +29,7 @@
+     }
+ 
+     private static int a(CommandListenerWrapper commandlistenerwrapper, String s, CommandContext<CommandListenerWrapper> commandcontext) {
+-        GameRules.GameRuleValue gamerules_gamerulevalue = commandlistenerwrapper.getServer().aQ().get(s);
++        GameRules.GameRuleValue gamerules_gamerulevalue = commandlistenerwrapper.getWorld().getGameRules().get(s); // CraftBukkit
+ 
+         gamerules_gamerulevalue.e().a(commandcontext, "value", gamerules_gamerulevalue);
+         commandlistenerwrapper.sendMessage(new ChatMessage("commands.gamerule.set", new Object[] { s, gamerules_gamerulevalue.a()}), true);
+@@ -37,7 +37,7 @@
+     }
+ 
+     private static int a(CommandListenerWrapper commandlistenerwrapper, String s) {
+-        GameRules.GameRuleValue gamerules_gamerulevalue = commandlistenerwrapper.getServer().aQ().get(s);
++        GameRules.GameRuleValue gamerules_gamerulevalue = commandlistenerwrapper.getWorld().getGameRules().get(s); // CraftBukkit
+ 
+         commandlistenerwrapper.sendMessage(new ChatMessage("commands.gamerule.query", new Object[] { s, gamerules_gamerulevalue.a()}), false);
+         return gamerules_gamerulevalue.c();