os-OPNWAF redirect feature

[0x646f6d]

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• I have read the contributing guide lines at https://github.com/opnsense/plugins/blob/master/CONTRIBUTING.md
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Is your feature request related to a problem? Please describe.
We started using OPNWAF as a front-end webserver. However, we face certain limitations regarding redirects of web pages. Consider the following typical use cases:

• Redirect HTTP to HTTPS: http://a.domain.com -> https://b.domain.com
• Redirect to another website: https://a.domain.com -> https://b.domain.com
• Redirect to a different url: https://a.domain.com/a -> https://a.domain.com/b

All these are classic features which are usually implemented on the reverse proxy. It would be great to support this.

Describe the solution you'd like
Such simple redirects could be implement with the Redirect directive. In the GUI I could imagine having another input field named Redirect and a dropdown to select the status. Of course, only either Remote destinations or Redirect can be set up.
In the configuration it could be set up like in the last example of the docs:

<Location "/one">
    Redirect permanent "http://example.com/two"
</Location>

Describe alternatives you've considered
none

Additional context
Add any other context or screenshots about the feature request here.