Added documentation note for the backwards incompatible change in r13996.

    python manage.py sqlindexes sessions

No more naughty words

~~~~~~~~~~~~~~~~~~~~~

Django has historically provided (and enforced) a list of profanities.

The :doc:`comments app </ref/contrib/comments/index>` has enforced this

list of profanities, preventing people from submitting comments that

contained one of those profanities.

Unfortunately, the technique used to implement this profanities list

was woefully naive, and prone to the `Scunthorpe problem`_. Fixing the

built in filter to fix this problem would require significant effort,

and since natural language processing isn't the normal domain of a web

framework, we have "fixed" the problem by making the list of

prohibited words an empty list.

If you want to restore the old behavior, simply put a

``PROFANITIES_LIST`` setting in your settings file that includes the

words that you want to prohibit (see the `commit that implemented this

change`_ if you want to see the list of words that was historically

prohibited). However, if avoiding profanities is important to you, you

would be well advised to seek out a better, less naive approach to the

problem.

.. _Scunthorpe problem: http://en.wikipedia.org/wiki/Scunthorpe_problem

.. _commit that implemented this change: http://code.djangoproject.com/changeset/13996

.. _deprecated-features-1.3:

Features deprecated in 1.3