Disable perMessageDeflate on WS servers

Workaround for this issue: https://github.com/websockets/ws/pull/632
as it has been fixed in the 1.x release that drops support for
node 0.10...

nodes/core/io/22-websocket.js

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013,2015 IBM Corp.
+ * Copyright 2013, 2016 IBM Corp.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,7 +82,15 @@ module.exports = function(RED) {
             RED.server.addListener('newListener',storeListener);
 
             // Create a WebSocket Server
-            node.server = new ws.Server({server:RED.server,path:path});
+            node.server = new ws.Server({
+                server:RED.server,
+                path:path,
+                // Disable the deflate option due to this issue
+                //  https://github.com/websockets/ws/pull/632
+                // that is fixed in the 1.x release of the ws module
+                // that we cannot currently pickup as it drops node 0.10 support
+                perMessageDeflate: false
+            });
 
             // Workaround https://github.com/einaros/ws/pull/253
             // Stop listening for new listener events