ntp-dinit was installed but ntpd was never enabled in services-artix.conf,
so nothing synced the clock. On hosts where the RTC stores local time
(e.g. QEMU -rtc base=localtime), first boot showed a UTC+offset shift
(e.g. +2h for Europe/Paris in summer). Enabling ntpd corrects the clock
within seconds of network up.
fixes#13