[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.
#! /bin/sh -e
#
if [ "$1" = remove -o "$1" = upgrade ]; then
if which install-docs >/dev/null 2>&1; then
install-docs -r cubicweb-doc
fi
fi
#DEBHELPER#
exit 0