Fixed #17068 - Documented that documentation fixes will be more freely backported.

* Security fixes will be applied to the current trunk and the previous two

  minor releases.

* Documentation fixes will generally be more freely backported to the last

  release branch (at the discretion of the committer), and don't need to meet

  the "critical fixes only" bar as it's highly advantageous to have the docs

  for the last release be up-to-date and correct, and the downside of

  backporting (risk of introducing regressions) is much less of a concern

  with doc fixes.

As a concrete example, consider a moment in time halfway between the release of

Django 1.3 and 1.4. At this point in time:

  ``1.2.X`` branch. They will trigger the release of ``1.3.1``, ``1.2.1``,

  etc.

* Documentation fixes will be applied to trunk, and if easily backported, to

  the ``1.3.X`` branch.

.. _release-process:

Release process