Hotfix repeated announcements

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/listeners/ConnectionListener.java

@@ -98,8 +98,10 @@ public class ConnectionListener extends BasicListener {
             }
         }
 
-        if(newPlayers.contains(player.getUniqueId()))
+        if(newPlayers.contains(player.getUniqueId())){
             BungeeCore.broadcast(BungeeCore.CHAT_PREFIX + "§7Begrüßt alle mal §e" + player.getName() + " §7auf dem Server§8!");
+            newPlayers.remove(player.getUniqueId());
+        }
     }
 
     /** To redirect players to the lobby in case of server closure. */