[session] call rollback in Connection.__exit__
If we just free the cnxset and clear the Connection, we're missing the
pending operation's rollback_event callbacks, which may be needed for
cleanup.
# -*- 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"""