Fixed #28593 -- Added a simplified URL routing syntax per DEP 0201.

Thanks Aymeric Augustin for shepherding the DEP and patch review.
Thanks Marten Kenbeek and Tim Graham for contributing to the code.
Thanks Tom Christie, Shai Berger, and Tim Graham for the docs.

docs/releases/1.9.txt

@@ -657,7 +657,7 @@ URLs
 * The application namespace can now be set using an ``app_name`` attribute
   on the included module or object. It can also be set by passing a 2-tuple
   of (<list of patterns>, <application namespace>) as the first argument to
-  :func:`~django.conf.urls.include`.
+  ``include()``.
 
 * System checks have been added for common URL pattern mistakes.
 
@@ -1233,8 +1233,8 @@ extending. This change necessitated a new template loader API. The old
 Details about the new API can be found :ref:`in the template loader
 documentation <custom-template-loaders>`.
 
-Passing a 3-tuple or an ``app_name`` to :func:`~django.conf.urls.include()`
----------------------------------------------------------------------------
+Passing a 3-tuple or an ``app_name`` to ``include()``
+-----------------------------------------------------
 
 The instance namespace part of passing a tuple as an argument to ``include()``
 has been replaced by passing the ``namespace`` argument to ``include()``. For