[client-connection] explicitly check that the client-connection is open
The check is also perform by the _srv_cnx property. But we do not need those
property anymore.
# -*- 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"""