Thanks Carl Meyer for the suggestion and Alex Gaynor and Carl for reviews.

Should be unneeded with Python 2.7 and up.
Added some unicode_literals along the way.

SuspiciousOperations have been differentiated into subclasses, and
are now logged to a 'django.security.*' logger. SuspiciousOperations
that reach django.core.handlers.base.BaseHandler will now return a 400
instead of a 500.

Thanks to tiwoc for the report, and Carl Meyer and Donald Stufft
for review.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16981 bcc190cf-cafb-0310-a4f2-bffc1f526a37

This applies to both our own [test] code and documentation examples. Also:
 * Moved the functions and handlers from `django.conf.urls.defaults` up to
   `django.conf.urls` deprecating the former module.
 * Added documentation for `handler403`.
 * Tweaked the URLs topic document a bit.

Thanks to pupeno and cdestigter for their great work contributing patches.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16818 bcc190cf-cafb-0310-a4f2-bffc1f526a37

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11854 bcc190cf-cafb-0310-a4f2-bffc1f526a37