- It is now possible to get information about why Pyramid raised a Forbidden
  exception from within an exception view.  The ``ACLDenied`` object returned
  by the ``permits`` method of each stock authorization policy
  (``pyramid.interfaces.IAuthorizationPolicy.permits``) is now attached to
  the Forbidden exception as its ``result`` attribute.  Therefore, if you've
  created a Forbidden exception view, you can see the ACE, ACL, permission,
  and principals involved in the request as
  eg. ``context.result.permission``, ``context.result.acl``, etc within the
  logic of the Forbidden exception view.