Fixed #12470 - django.contrib.messages CookieStorage failing silently in safari when comma is used in message

      This issue was fixed by changing the underlying cookie storage mechanism.

This will fix other bugs with cookies for Internet Explorer and Safari, but
could also cause backwards incompatibilities with existing javascript that
may parse cookie values that contain commas or semi-colons, and, very
rarely, with existing cookie values.



git-svn-id: http://code.djangoproject.com/svn/django/trunk@12282 bcc190cf-cafb-0310-a4f2-bffc1f526a37