Potential stdout clogging up fix.

src/de/steamwar/bungeecore/Subserver.java

@@ -223,6 +223,7 @@ public class Subserver implements Runnable {
             }
             cachedPlayers.clear();
 
+            reader.close(); // Prevent stdout clogging up
             process.waitFor();
         } catch(IOException e) {
             logger.log(Level.SEVERE, "Server " + serverName + " was interrupted!", e);