code: function matchHost(req, aUrl) {
  	var thisServer = {
  		host: req.headers.host
  	};
  	var parsedUrl = url.parse(aUrl);
  	if (parsedUrl.host === thisServer.host) {
  		parsedUrl.host = '';
  		return url.format(parsedUrl);
  	}
  	return aUrl;
  }
docs: Util for stripping host names from URLs on this server. If aUrl indicates a resource on this host (as given by the request's Host header),
  returns the URL with this server's host removed. Otherwise, returns aUrl unmodified.
  <p>
  eg. matchHost({ host: 'foo.com:8081' }, 'http://foo.com/file/fizz.txt') returns '/file/fizz.txt'<br>
  eg. matchHost({ host: 'foo.com:8081' }, 'http://bar.com/action?frob=quux') returns 'http://bar.com/action?frob=quux'
  </p.
  @param {HttpRequest}
  @param {String} url
  @returns {String} The resulting URL