title: socket.io connect to unix socket
body: <p>I want to connect to unix socket using socket.io-client, 
  No success (mostly timeout, last sample - dns resolution error).</p>
  
  <pre><code>var clientio  = require('socket.io-client');
  // i tried all variants here
  //client=clientio.connect('port.io/',{'force new connection': true});
  //client=clientio.connect('unix://port.io/',{'force new connection': true});
  //client=clientio.connect('http//unix:port.io/',{'force new connection': true});
  
  client.on('connect',connect);
  </code></pre>
  
  <p>Is there any way to connect socket.io client to unix socket ?</p>
  
  <p>I checked server socket using <code>nc -U port.io</code>, it works fine.</p>