[Feature Request] Ability to disabling service fallbacks via web UI

[OdinVex]

If we could add options to disable fallbacks for various services (DNS, NTP) that'd be appreciated. An example would be FallbackNTP= to /etc/systemd/timesyncd.conf.d/50-cockpit.conf to prevent NTP from falling back to distro NTPs when they should use network NTPs (especially since they're specified in DHCP and are being ignored for whatever "..." reason). I don't like any systems falling back to anything by default, that includes NTP, DNS, etc, it's something else to manage or consider a risk/liability.