Support ACME Protocol

Hello, since Google has announced to shorten the maximum certificate duration to 90 days, it would make sense to introduce support for the ACME protocol.

https://www.chromium.org/Home/chromium-security/root-ca-policy/moving-forward-together/

This is expected to be introduced by the end of 2024.

Manually replacing the certificate takes too much time and is prone to errors. It should therefore be possible to replace the certificate automatically.

Regards,

Carsten