title: Socket.io 1.0 : configure close timeout
body: <p>How can I configure the option 'close timeout' with the code below ? </p>
  
  <pre><code> var app = require('express')();
   var server = require('http').Server(app);
   var io = require('socket.io')(server);
   ...
   server.listen(port, ip);     
  </code></pre>
  
  <p>I read the doc about socket.io and I found that :</p>
  
  <pre><code> var socket = require('socket.io')({
       // options go here
   });
  </code></pre>
  
  <p>but I can't add options because I'm using the <code>server</code> variable.</p>
  
  <p>Thanks.</p>