SPIGOT-3329: Allow per world loot tables

By: md_5 <git@md-5.net>

paper-server/nms-patches/WorldServer.patch

@@ -67,17 +67,16 @@
  
          persistentscoreboard.a(this.scoreboard);
          ((ScoreboardServer) this.scoreboard).a((Runnable) (new RunnableSaveScoreboard(persistentscoreboard)));
--        this.B = new LootTableRegistry(new File(new File(this.dataManager.getDirectory(), "data"), "loot_tables"));
--        this.C = new AdvancementDataWorld(new File(new File(this.dataManager.getDirectory(), "data"), "advancements"));
--        this.D = new CustomFunctionData(new File(new File(this.dataManager.getDirectory(), "data"), "functions"), this.server);
 +        // CraftBukkit start
 +        } else {
 +            this.scoreboard = getServer().getScoreboardManager().getMainScoreboard().getHandle();
 +        }
++        // CraftBukkit end
 +
-+        if (this.B == null) {
-+            this.B = new LootTableRegistry(new File(new File(this.dataManager.getDirectory(), "data"), "loot_tables"));
-+        }
+         this.B = new LootTableRegistry(new File(new File(this.dataManager.getDirectory(), "data"), "loot_tables"));
+-        this.C = new AdvancementDataWorld(new File(new File(this.dataManager.getDirectory(), "data"), "advancements"));
+-        this.D = new CustomFunctionData(new File(new File(this.dataManager.getDirectory(), "data"), "functions"), this.server);
++        // CraftBukkit start
 +        if (this.C == null) {
 +            this.C = new AdvancementDataWorld(new File(new File(this.dataManager.getDirectory(), "data"), "advancements"));
 +        }