DNSSEC: DS digest generation not using canonical form

[Ingo B. <in...@ji...>]

Hey

The DS digest generated by DNSSEC.generateDSDigest takes the owner name of
the DNSKEY as is instead of in canonical form. Canonical form is required by
RFC 4034 [1]. Patch is attached.

Regards,
Ingo

[1] http://tools.ietf.org/html/rfc4034#section-5.1.4