version info for dnssec-*

[Mark_Andrews at isc.org]

1403.   [func]          dnssec-signzone, dnssec-keygen, dnssec-makekeyset
                        dnssec-signkey now report their version in the
                        usage message.
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org