title: Autobahn Exception WebSockets protocol violation
body: <p>in my android application I want to use the autobahn library to use websockets.</p>
  
  <p>I think the server is using draft-17.
  Can someone tell me, how to set up the Client to use this protocol?</p>
  
  <p>I have this code:</p>
  
  <pre><code>      mConnection.connect(url,new String[] {"protocolname?"}, new WebSocketHandler() {
  
           //some functions
        },options);
  </code></pre>
  
  <p>Greetings</p>
  
  <p><strong>UPDATE</strong>
  On my server I use Jetty in version 8.1. </p>
  
  <p><strong>UPDATE</strong> 
  the output from LogCat is:</p>
  
  <pre><code>01-15 22:54:53.481: D/de.tavendo.autobahn.WebSocketReader(32452): created
  01-15 22:54:53.491: D/de.tavendo.autobahn.WebSocketConnection(32452): WS reader created     and started
  01-15 22:54:53.491: D/de.tavendo.autobahn.WebSocketReader(32452): running
  01-15 22:54:53.491: D/de.tavendo.autobahn.WebSocketWriter(32452): created
  01-15 22:54:53.491: D/de.tavendo.autobahn.WebSocketConnection(32452): WS writer created and started
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketConnection(32452): opening handshake received
  01-15 22:54:53.551: D/Websocket(32452): Status: Connected to ws://192.168.178.30:8080
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketReader(32452): run() : WebSocketException (de.tavendo.autobahn.WebSocketException: RSV != 0 and no extension negotiated)
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketReader(32452): ended
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketConnection(32452): fail connection [code = 4, reason = WebSockets protocol violation
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketReader(32452): quit
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketWriter(32452): ended
  01-15 22:54:53.551: D/Websocket(32452): Connection lost.
  01-15 22:54:53.551: D/de.tavendo.autobahn.WebSocketConnection(32452): worker threads stopped
  </code></pre>