[1.0.X] Fixed #10884 - more lenient regexp for matching forms in CSRF post-processing

  
Thanks to Ryszard Szopa for the report and fix

Backport of r10617


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10618 bcc190cf-cafb-0310-a4f2-bffc1f526a37