sdbox: Verify that mail_attachment_fs backend supports RENAME property. This isn't needed by mdbox.
sdbox: Verify that mail_attachment_fs backend supports RENAME property.
This isn't needed by mdbox.

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