Rename mac_biba_subject_equal_ok() to mac_biba_subject_privileged() to evolve the notion of Biba privilege a bit.
Rename mac_biba_subject_equal_ok() to mac_biba_subject_privileged()
to evolve the notion of Biba privilege a bit.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories

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