imapc: Avoid unnecessarily selecting a mailbox when looking up its GUID.
imapc: Avoid unnecessarily selecting a mailbox when looking up its GUID.

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