Question about "acme and challenge DNS-01"

[Aleksandar Lazic]

Hi.

I like upcoming feature for ACME certificates.
As it maybe known is that the challenge DNS-01 requires to propagate the 
acme-challenge into the DNS.
There are several DNS Provider which offers some HTTP API like DESec and some 
others.

What's the plan to handle this DNS propagation within HAProxy?

For go is there the https://github.com/orgs/libdns/repositories which is used by 
https://github.com/orgs/caddy-dns/repositories to handle that.

That's then the snippet in Caddyfile.

```
        tls {
                dns desec {
                        token "$TOKEN"
                }
                propagation_delay 2m # Important
        }

```

For rust is this one an example https://github.com/stalwartlabs/dns-update/

For ferronweb ( https://github.com/ferronweb/ferron/tree/develop-2.x ) is this 
the config for dns challange.

```
    auto_tls
    auto_tls_contact "$EMAIL"
    auto_tls_cache "letsencrypt-cache"
    auto_tls_letsencrypt_production
    auto_tls_challenge "dns-01" provider="desec" api_token="$TOKEN"

```

Regards
Aleks