imapc: If mail prefetching fails because of disconnection, don't log about it again.
imapc: If mail prefetching fails because of disconnection, don't log about it again.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot