This upgrade is executed only if IPA version is older than 4.0 Requires detection if 'idnsforwardzone' objectclass is presented in schema before schema is upgraded Design: http://www.freeipa.org/page/V4/Forward_zones#Updates_and_Upgrades Ticket: https://fedorahosted.org/freeipa/ticket/3210 Reviewed-By: Martin Kosek <mkosek@redhat.com>