Close issue #440 - players remaining after logout

proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java

@@ -102,7 +102,7 @@ public class HandlerBoss extends ChannelInboundMessageHandlerAdapter<Object>
                 ProxyServer.getInstance().getLogger().log( Level.SEVERE, handler + " - exception processing exception", ex );
             }
 
-            channel.close();
+            ctx.channel().close();
         }
     }
 }