unbound: move advanced settings page to MVC/API, log-reply option etc.

[fichtner]

Important notices

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• [x] I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• [x] 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.

Static pages should go away eventually. For Unbound to move further find smallest impact page(s).

Describe the solution you like

Advanced page migration is easy and gives opportunity to add more features.

Describe alternatives you considered

Moving all to MVC is too much work, too many side-effects.

Additional context

https://github.com/opnsense/core/issues/5795 https://github.com/opnsense/core/issues/5256

[swhite2]

While at it, let's move https://github.com/opnsense/core/issues/5256 to this page as well.

Include log-reply conf option as well.