Clarified and expanded documentation for Manager.use_for_related_fields.
Clarified and expanded documentation for Manager.use_for_related_fields.

This is for Manager subclasses that are default managers, but only
sometimes.  The general rule is: "don't use it." If you really need it,
read the instructions.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4010057

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel