Log Message:
Updating security/p5-Net-DNS-SEC from 0.15 to 0.16

pkgsrc changes:
- Adjust dependencies
- Add license definition

Upstream changes:
***0.16 March 12, 2010
   Feature: KEY inherits DNSKEY
   This helps maintenance in one part of the code.

   Feature: keylength methode rt.cpan.org #53468
   Added keylength method for RSA and DSA
   Acknowledgements Hugo Salgado

   Fix: rt.cpan.org #51778
   Empty bitmap would cause error about undefined ARRAY in NSEC/NSEC3.
   Now the code will allow empty bitmaps gracefully

   Feature: New Algorithm Support (rt.cpan.org #51092)
   SHA2 algorithm support, including NSEC3 algorithm parameters updated
   Acknowledgement Jakob Shlyter

   Fix: rt.cpan.org #42089
   NSEC3 Algorithm support in NSEC3 broken
   patch by Wes Hardaker