6659 nvlist_free(NULL) is a no-op
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Marcel Telka <marcel@telka.sk>
Approved by: Robert Mustacchi <rm@joyent.com>

PSARC 2008/382 Fast Reboot
6714038 Fast Reboot support for x86 platforms

OpenSolaris Launch