Support configuring NTP from DHCP

[copumpkin]

Currently we can specify a list of NTP servers explicitly, and we can configure arbitrary hooks for the dhcpcd, but we can't hook the two together and tell our NTP daemon to talk to the NTP servers advertised over DHCP. We can probably hack something together with some hooks but it would be nice to get first-class support for the feature.

[copumpkin]

From what I can tell, timesyncd has some options for it but our NixOS module doesn't expose them, and there's nothing easy I can see for the more conventional ntpd pathway.

[lheckemann]

As far as I can tell, this is only supported through the use of networkd. But AFAIR there's some good work going on with networkd support :)

[stale]

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[lheckemann]

no

[stale]

I marked this as stale due to inactivity. → More info