[pkg] Specify priority “optional” instead of the obsolete “extra”
Quoting Lintian, “Since Debian Policy version 4.0.1, the priority extra
has been deprecated.” So let's use “optional” instead.
.. _appobject_module:
:mod:`cubicweb.appobject`
=========================
.. automodule:: cubicweb.appobject
.. autoclass:: AppObject
:show-inheritance:
:members: