Fix #177 - greload and listeners

proxy/src/main/java/net/md_5/bungee/BungeeCord.java

@@ -201,6 +201,7 @@ public class BungeeCord extends ProxyServer
             $().log( Level.INFO, "Closing listen thread {0}", listener.socket );
             try
             {
+                listener.interrupt();
                 listener.socket.close();
                 listener.join();
             } catch ( InterruptedException | IOException ex )

proxy/src/main/java/net/md_5/bungee/ListenThread.java

@@ -27,7 +27,7 @@ public class ListenThread extends Thread
     @Override
     public void run()
     {
-        while ( BungeeCord.getInstance().isRunning )
+        while ( !isInterrupted() )
         {
             try
             {