dsync: Fixed iterating through mailboxes when using proxy. This fixes "Unexpected reply from server: +" errors.
dsync: Fixed iterating through mailboxes when using proxy.
This fixes "Unexpected reply from server: +" errors.

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