It looks like all the documentation for the various DNS providers has been removed from https://caddyserver.com/v1/docs/tls.dns.blah. Why? And where has it gone? Specifically, where are the environment variables that set the credentials documented? About four links away from there, I get to the lego docs, but that still doesn’t tell me what variables I need to set so that Caddy knows how to make the appropriate changes to the DNS records.
Yes, I know Caddy 2 is in beta, but that’s what it is–BETA. And however good your reasons, it’s still highly incompatible with v1. Seems like you’re deprecating the production release while it’s still current.