Request: add --include/--exclude arguments to specify the domain(s)

[mbegerau]

I would really like to see a feature where I could limit the domains for which the certificates are being dumped.

--include <regex string> (all domains that match the regex string are whitelisted, other domains are being ignored)
--exclude <regex string> (all domains that match the regex string are blacklisted, other domains are being dumped)

I have two cases where I need only a few certificates for a specific task, and now I can ignore the other certificates or rm them manually or in a post-hook. Would be a nice-to-have feature to automatically define the domains in the command arguments.