[1.8.x] Fixed #25033 -- Added context_processors.auth to documented admin dependencies.

   :mod:`django.contrib.sessions`.  If these applications are not

   in your :setting:`INSTALLED_APPS` list, add them.

3. Add ``django.contrib.messages.context_processors.messages`` to

3. Add ``django.contrib.auth.context_processors.auth`` and

   ``django.contrib.messages.context_processors.messages`` to

   the ``'context_processors'`` option of the ``DjangoTemplates`` backend

   defined in your :setting:`TEMPLATES` as well as

   :class:`django.contrib.auth.middleware.AuthenticationMiddleware` and