iSCSI boot for Solaris approved

The ARC has approved the PSARC/2008/427 iSCSI Boot case.

This project is to enable Solaris to boot off iSCSI luns via regular network adapters. Different approaches, iBFT/OBP, are adopted to implement this feature on x86/sparc platforms.

For the readers unaware of iBFT: This is a part of the ACPI 3.0 specification to enable a kernel to gather additional data needed to boot via iSCSI.