3535 mdb ::print should pretty-print ipaddr_t and friends
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Marcel Telka <marcel@telka.sk>
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Approved by: Gordon Ross <gwr@nexenta.com>