small issue on systemd machines

[aboe76]

Add option for systemd machines to set:

timedatectl set-ntp true

see:
https://www.lisenet.com/2016/time-synchronisation-with-chrony-on-rhel-7/

[tacerus]

What for? This merely enables systemd-timedated.service, which on any reasonably configured distribution using Chrony already links to chronyd.service using a distribution provided file in /usr/lib/systemd/ntp-units.d/. And the formula already enables chronyd.service directly.