merge 3.18.4 into default
server/test/unittest_migractions fails due to interaction between new
constraint test (from 3.18) and composite deletion change (in 3.19).
#! /bin/sh -e
case "$1" in
remove)
if [ -x "/etc/init.d/cubicweb-ctl" ]; then
invoke-rc.d cubicweb-ctl stop || true
fi
;;
esac
#DEBHELPER#
exit 0