[1.2.X] Fixes #14743 - Add sphinx links and other cleanups to...

[1.2.X] Fixes #14743 - Add sphinx links and other cleanups to topics/http/urls.txt. Thanks adamv for the patch.

Backport of applicable portions of 14705 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14706 bcc190cf-cafb-0310-a4f2-bffc1f526a37