Support for RFC 2136 DNS provider

[shibayan]

Discussed in #938

^{Originally posted by gnommak January 18, 2026}
Is there any plans to add RFC 2136 to list of DNS providers?
I'm currently have 2 providers in my company. One is Azure DNS for development projects and seccond one is standalone main company DNS server. And according to our company security rules I allowed to add only TXT DNS reccords using RFC 2136 TSIG key for DNS challenge. As for now I use LEGO CLI to generate certificate. And add it to my vault to see it in Acmebot.
It would be great to have RFC 2136 support so I could renew certs in one place.
Also if certs added in "Unmanaged certificates" I don't see expiration days left.
Thx!