config: Give a somewhat better warning for when using protocols=imaps or pop3s.
config: Give a somewhat better warning for when using protocols=imaps or pop3s.

jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot