MFC r264851

Eliminated optarg global being used outside of the function which called getopt

Sponsored by:	Multiplay
MFC r264863

Add information about supported NCQ functionality to camcontrol identify.

Sponsored by:	Multiplay
MFC r264878

Increase ACPI_MAX_TASKS to be 4 x the number of CPU's as 2 x was still
insufficient on some machines

Sponsored by:	Multiplay