[1.0.X]: Fixed #10553 -- Corrected several uses of `URLconf` in documentation...

[1.0.X]: Fixed #10553 -- Corrected several uses of `URLconf` in documentation and comments, according to the Django style guide.  Based on patch from rduffield.

Backport of r10256 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10257 bcc190cf-cafb-0310-a4f2-bffc1f526a37