Don't call ntohs on the data offset field - it's only one byte!
Optimize the mbuf -> ipinfo_t translator.
Switch to just passing a raw buffer for the ipinfo_t argument.
Don't forget IPv6!
Merge branch '20130421-ip-provider' into 20130427-udp-provider
Switch from mbufs to raw buffers for the IP headers.
Merge branch '20130427-udp-provider' into 20130428-tcp-provider
Merge branch '20130428-tcp-provider' into markj-develop
Convert to using raw buffers.
Get rid of the mbuf translator.
Merge branch '20130421-ip-provider' into 20130427-udp-provider

Conflicts:
	cddl/lib/libdtrace/ip.d
Merge branch '20130427-udp-provider' into 20130428-tcp-provider
Merge branch '20130428-tcp-provider' into markj-develop