Dovecot: Support local_name for individual SSL certificates

short description

Dovecot supports the ability for each individual domain name through the use of the local name directive.

For example:

local_name mail.example.com {
   ssl_cert=</etc/letsencrypt/live/mail.example.com/fullchain.pem
   ssl_key=</etc/letsencrypt/live/mail.example.com/privkey.pem
}

correct behaviour

It would be good if ISPConfig could support this by default.

environment

Server OS: Ubuntu Server OS version: 20.04 ISPConfig version: 3.2.2

proposed fix

Allow ISPconfig to maintain these configuration within dovecot. It seems this has to be a change to the config rather than from the database form what I can see around, unfortunately.