unbound: use domain name specified in dhcp server when registering names

[fichtner]

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• I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

Is your feature request related to a problem? Please describe.

Unbound will not register different domains for dynamic leases according to their domain name settings in the DHCP configuration.

Describe the solution you like

A configuration file for the lease watcher should be written prior to starting it to provide the daemon with the necessary lease ranges and domain names to be used.

Describe alternatives you considered

Leaving the current limitation in place which is fine for a larger portion of the user base.

Additional context

Recent discussion here: https://forum.opnsense.org/index.php?topic=24084.0

[ctrlbrk42]

Thank you franco :)

I added my +1 to show support.