[web] fix AbstractSessionManager.clean_sessions (closes #5757240)
sessions were not closed if "last_usage_time = session.cnx.check()" actually
raises an AtributeError.
#! /bin/sh -e
#
if [ "$1" = configure ]; then
if which install-docs >/dev/null 2>&1; then
install-docs -i /usr/share/doc-base/cubicweb-doc
fi
fi
#DEBHELPER#
exit 0