mailbox_list_index=yes: Don't crash if destroying list before its init finished.
mailbox_list_index=yes: Don't crash if destroying list before its init finished.

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