Set Unbound DNS to use forward-first instead of round-robin

[SamTheRuby]

Hi,
I am using Unbound DNS with DNS over TLS. I want to have more then one DNS over TLS provider but only fall back to the other providers in the event that my first DNS provider goes down AKA forward-first mode. I don't see any option in the WebGUI to set forward-first mode, is there any way to enable that in the Unbound in OPNsense? Thanks all for your help!

[planetf1]

See https://forum.opnsense.org/index.php?topic=45521.0 - I'm suggesting a PR