imapc: Fixed imapc_list_prefix setting to work with INBOX.
imapc: Fixed imapc_list_prefix setting to work with INBOX.

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