title: Allow colon in Django urls
body: <p>I am trying to write urls rule for <code>http://localhost:8000/api/http://www.google.com/</code> </p>
  
  <p>which is <code>url(r'^api/(?P&lt;url&gt;(:\d+)+[.\w]+)/$', 'qlu_app.views.api', name='api'),</code></p>
  
  <p>But it is not working ..Can some one please help me.</p>