Thanks Vinay Sajip for the support of his django3 branch and Jannis Leidel for the review.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17414 bcc190cf-cafb-0310-a4f2-bffc1f526a37
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16680 bcc190cf-cafb-0310-a4f2-bffc1f526a37