Fixes #14743 - Add sphinx links and other cleanups to topics/http/urls.txt....

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

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14705 bcc190cf-cafb-0310-a4f2-bffc1f526a37