docs: cache framework: cmemcache: refers to v0.96 vs. "development version"

[Phil Mocek]

In the "cache framework" page of the documentation, in section
"Setting up the cache", is written:

The fastest available option is a module called cmemcache,
available at ​http://gijsbert.org/cmemcache/ . (This module is
only compatible with the Django development version. Django 0.96
is only compatible with the second option, below.)

There is no mention of whether cmemcache works with version
1.0. Possibly this wording was not updated when the development
branch was released as 1.0.

​http://docs.djangoproject.com/en/dev/topics/cache/#setting-up-the-cache

[Malcolm Tredinnick]

(In [9435]) Fixed #9377 -- Clarified when cmemcached support was included in Django.

[Malcolm Tredinnick]

(In [9437]) [django-1.0.X] Fixed #9377 -- Clarified when cmemcached support was included in Django.

Backport of r9435 from trunk.