title: Django Deprecation Warning or ImproperlyConfigured error - Passing a 3-tuple to django.conf.urls.include() is not supported
body: <p>I have a deprecation warning in Django 1.11:</p>
  
  <pre><code>RemovedInDjango20Warning: Passing a 3-tuple to django.conf.urls.include() is deprecated. Pass a 2-tuple containing the list of patterns and app_name, and provide the namespace argument to include() instead.
    url(r'^admin/', include(admin.site.urls))
  </code></pre>
  
  <p>In Django 2.0 this gives the error:</p>
  
  <pre><code>django.core.exceptions.ImproperlyConfigured: Passing a 3-tuple to include() is not supported. 
  Pass a 2-tuple containing the list of patterns and app_name, and provide the namespace argument to include() instead.
  </code></pre>
  
  <p>How should I change <code>url(r'^admin/', include(admin.site.urls))</code>? I tried to look at the documentation, but I have no clue ...</p>
  
  <p>Here is my urls.py:</p>
  
  <pre><code>from django.conf.urls import include, url
  from django.contrib import admin
  admin.autodiscover()
  
  urlpatterns = [
      url(r'^admin/', include(admin.site.urls)),
      url(r'^admin/django-ses/', include('django_ses.urls')),
      url(r'^api/1.0/', include('feedcrunch_api_v1.urls')),
      url(r'^oauth/', include('oauth.urls')),
      url(r'^@(?P&lt;feedname&gt;\w+)/admin/', include('feedcrunch_rssadmin.urls')),
      url(r'^@(?P&lt;feedname&gt;\w+)/', include('feedcrunch_rssviewer.urls')),
      url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')),
      url(r'', include('feedcrunch_home.urls')),
  ]
  </code></pre>