[connection] add logging method on connection
If we are to use this object like we currently do with session, we need to have
the logging method as a lot of code use them.
#! /bin/sh -e
if [ -x "/etc/init.d/cubicweb-ctl" ]; then
invoke-rc.d cubicweb-ctl restart || true
fi
#DEBHELPER#
exit 0