further clean command handler
OPENDNSSEC-573: libhsm: Optimize storage in HSM by deleting the public key directly if SkipPublicKey is used.
OPENDNSSEC-573: Correct the NEWS
Merge pull request #37 from yschaeff/commandhandler3

further clean command handler
Merge pull request #38 from bellgrim/OPENDNSSEC-573

OPENDNSSEC-573: libhsm: Optimize storage in HSM by deleting the public ...