title: Connect-redis store don't work with socket.io
body: <p>I have an easy question for someone who use connect-redis.</p>
  
  <p>I want to use it with socket.io with the function <code>io.set('store', something)</code>.
  I don't know why, when I do</p>
  
  <pre><code>var RedisSessionStore = require('connect-redis')(express);
  var sessionStore = new RedisSessionStore();
  
  app.use(express.session({
    secret: 'some totally secret key',
    cookie: {
      maxAge: 1000 * 60 * 60
    },
    store: sessionStore
  }));
  
  //and then I wan't to use the session store for socket.io
  io.set('store', sessionStore);
  </code></pre>
  
  <p>It says <code>Object #&lt;RedisStore&gt; has no method 'subscribe'</code></p>