mac-sys-utils:  Add gestalt()
Genie:  Use sys::mac::gestalt() in /sys/mac/rom
Genie:  Avoid N::Gestalt_Selector
Genie:  Simplify is_valid_Gestalt_Selector()

Don't call the fancy Nitrogen version of Gestalt() when the C version is
almost exactly what we want.
Genie -> mac-sys-utils:  Move gestalt_defined()
Genie:  Rewrite Gestalt table traversal
Genie:  Use mac::sys::gestalt() in /sys/cpu
Genie:  Axe N::Gestalt_Selector use in /sys/cpu
Genie:  mac::sys::gestalt() in /sys/mac/machine/id
mac-sys-utils:  Add gestalt_bit_set()
Genie:  Use gestalt_bit_set() in /sys/mac/vol/list
Genie:  Use gestalt_bit_set() in IO/SerialDevice
Merge branch 'gestalt'
Pedestal:  Use mac::sys::gestalt_bit_set()