[1.0.X] Fixed #10604 -- Added note on the limitation of ungettext, especially...

[1.0.X] Fixed #10604 -- Added note on the limitation of ungettext, especially as relating to the {% blocktrans %} tag. Thanks to bartTC for the report, and Ramiro Morales for the patch.

Merge of r11164 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@11167 bcc190cf-cafb-0310-a4f2-bffc1f526a37