Fixed #10460: the logout view can now redirect like the rest of the auth...

Fixed #10460: the logout view can now redirect like the rest of the auth views. Thanks, chronos and steingrd.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10332 bcc190cf-cafb-0310-a4f2-bffc1f526a37