Feature requests

Allow admin to get multidomain Let's Encrypt SSL certificates for an arbitrary set of domains.

DirectAdmin already has all the code it needs to fetch and install multidomain SSL certificates (I think). So all that it needs is a UI menu item, available for admins, that will let them specify any set of domains (provided each domain is already present on the server) and fetch and install a single Let's Encrypt SSL certificate for all those domains. The SSL certificate would be installed as the server certificate.

The specific application I have in mind is to be able to provide users with subdomains in more than one domain. Instead of having each user get their own certificate, just install it once in the server, as a wildcard, for each domain in use.

This would be really useful because it could include a certificate for the server's hostname.