Fixed typo in docs - supports_objects_permissions should be supports_object_permissions

To enable object permissions in your own

:ref:`authentication backend <ref-authentication-backends>` you'll just have

to allow passing an ``obj`` parameter to the permission methods and set the

``supports_objects_permissions`` class attribute to ``True``.

``supports_object_permissions`` class attribute to ``True``.

A nonexistent ``supports_objects_permissions`` will raise a hidden

A nonexistent ``supports_object_permissions`` will raise a hidden

``PendingDeprecationWarning`` if used in Django 1.2. In Django 1.3, this

warning will be upgraded to a ``DeprecationWarning``, which will be displayed

loudly. Additionally ``supports_objects_permissions`` will be set to ``False``.

loudly. Additionally ``supports_object_permissions`` will be set to ``False``.

Django 1.4 will assume that every backend supports object permissions and

won't check for the existence of ``supports_objects_permissions``, which

won't check for the existence of ``supports_object_permissions``, which

means not supporting ``obj`` as a parameter will raise a ``TypeError``.