2608. [func] Perform post signing verification checks in

2608.   [func]          Perform post signing verification checks in
                        dnssec-signzone.  These can be disabled with -P.

                        The post sign verification test ensures that for each
                        algorithm in use there is at least one non revoked
                        self signed KSK key.  That all revoked KSK keys are
                        self signed.  That all records in the zone are signed
                        by the algorithm.  [RT #19653]