Update to Minecraft 1.12-pre5

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

paper-server/nms-patches/WorldServer.patch

@@ -591,12 +591,8 @@
                  }
              }
  
-@@ -980,9 +1232,10 @@
-     }
- 
-     protected void t() {
--        boolean flag = this.Y();
-+        boolean flag = this.Y(); // PAIL: rename
+@@ -983,6 +1235,7 @@
+         boolean flag = this.isRaining();
  
          super.t();
 +        /* CraftBukkit start
@@ -608,7 +604,7 @@
              this.server.getPlayerList().sendAll(new PacketPlayOutGameStateChange(8, this.q));
          }
 +        // */
-+        if (flag != this.Y()) {
++        if (flag != this.isRaining()) {
 +            // Only send weather packets to those affected
 +            for (int i = 0; i < this.players.size(); ++i) {
 +                if (((EntityPlayer) this.players.get(i)).world == this) {