[connection] handle and explicitly life cycle on Connection
Like ClientConnection, Connection object need to be explicitly started and stop.
They aims to be used as context manager.
#! /bin/sh -ecase "$1" in remove) if [ -x "/etc/init.d/cubicweb-ctl" ]; then invoke-rc.d cubicweb-ctl stop || true fi ;;esac#DEBHELPER#exit 0