Add Optional Tick Shuffling

This prevents players from 'gaming' the server, and strategically relogging to increase their position in the tick order.

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

paper-server/src/main/java/org/spigotmc/SpigotConfig.java

@@ -278,4 +278,10 @@ public class SpigotConfig
         SpigotConfig.playerSample = SpigotConfig.getInt( "settings.sample-count", 12 );
         System.out.println( "Server Ping Player Sample Count: " + SpigotConfig.playerSample );
     }
+
+    public static int playerShuffle;
+    private static void playerShuffle()
+    {
+        SpigotConfig.playerShuffle = SpigotConfig.getInt( "settings.player-shuffle", 0 );
+    }
 }