title: expressjs middleware next function vs response objects next function
body: <p>I recently noticed an undocumented <code>next</code> function on the expressjs <a href="http://expressjs.com/api.html#res.status" rel="nofollow">response</a> object. </p>
  
  <p>Is that function the same as <code>next</code> in the <a href="http://expressjs.com/api.html#middleware" rel="nofollow">middleware</a> <code>function(req, res, next)</code> ?</p>
  
  <p>Is its use discouraged because it is undocumented?</p>