* sys/crypto/sha2/sha2.c: hmac-sha2-{256,384,512} support.  attaches   96 bits of crypto checksum (not sure if this is right - there's no   draft on this).   TODO: interop tests
* sys/crypto/sha2/sha2.c: hmac-sha2-{256,384,512} support.  attaches
  96 bits of crypto checksum (not sure if this is right - there's no
  draft on this).
  TODO: interop tests

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame