openbox in slackware 15 or current

It seems I need this in .xinitrc:

Reinvoke within a dbus session:

if [ -z "$DBUS_SESSION_BUS_ADDRESS" ] && [ -x /usr/bin/dbus-run-session ]; then
   exec dbus-run-session -- $0 "$@"
fi

https://www.linuxquestions.org/questions/slackware-14/current-notify-send-with-fvwm-or-any-wm-4175706394/