title: Retrieve and unjumble cookie data from superagent response header
body: <p>I'm using supertest and trying to get the cookie data cleanly</p>
  
  <pre><code>agent.post('/login').send('username:u','password:p').end(function(err, res) {
      agent.cookie = res.req._headers.cookie;
  });
  </code></pre>
  
  <p>But to cookie data I get is jumbled up</p>
  
  <blockquote>
    <p><code>connect.sid=s%3Afc20GaiFXGNju1rxqDSOEiA4.W3XfTacI0xhk4gQ9Bdh1LLC%2FlhjnAwVmQkUX%2F7%2FJEAo</code></p>
  </blockquote>
  
  <p>instead of cleanly like this (and the above is even longer for some reason)</p>
  
  <blockquote>
    <p><code>{ 'connect.sid': 'T0jrnU09DzCYN68FsgspuY5g' }</code></p>
  </blockquote>
  
  <p>How do I get the latter?</p>