[c-c list] add an optional argument to the list command (closes #2709703)
This optional argument allows to restrict listing to only
a given type of items (cubes, instances, configurations).
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s repository side views, usually for notification"""