[1.1.X] Fixed #10864 -- Clarified the role played by redirect_to_field in the...

[1.1.X] Fixed #10864 -- Clarified the role played by redirect_to_field in the login_required auth decorator. Thanks to trigeek38 for the suggestion, and SmileyChris for the draft.

Merge of r11544 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@11566 bcc190cf-cafb-0310-a4f2-bffc1f526a37