Added a note about queryset.query being opaque.
Added a note about queryset.query being opaque.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8955 bcc190cf-cafb-0310-a4f2-bffc1f526a37

--HG--
extra : convert_revision : b6e5e2b8778b24da6327c4731f20420a74e4e325

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