RFD 071: Added changed MAC to be HMAC.
RFD 071: Added changed MAC to be HMAC.

AnthonyMann/rfd,davepacheco/rfd,joyent/rfd,davepacheco/rfd,davepacheco/rfd,melloc/rfd,rmustacc/rfd,joyent/rfd,AnthonyMann/rfd,joyent/rfd,rmustacc/rfd,joyent/rfd,melloc/rfd,davepacheco/rfd,davepacheco/rfd,melloc/rfd