Fixed #2325 -- fix the authentication framework to work with new-style classes.

Patch from Joseph Kocherhans.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@3346 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/auth/__init__.py

@@ -38,7 +38,7 @@ def authenticate(**credentials):
         if user is None:
             continue
         # Annotate the user object with the path of the backend.
-        user.backend = str(backend.__class__)
+        user.backend = "%s.%s" % (backend.__module__, backend.__class__.__name__)
         return user
 
 def login(request, user):