doveadm backup: Fixed "is source empty" check. In POP3 boxes there is only INBOX, and it's possible that source becomes empty while backup has mails. The check is now "has source always been empty?"
doveadm backup: Fixed "is source empty" check.
In POP3 boxes there is only INBOX, and it's possible that source becomes
empty while backup has mails. The check is now "has source always been
empty?"

damoxc/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot