MFH: r292522

Merge from contrib/openbsm to bring the kernel audit bits up to date with OpenBSM 1.2 alpha 4:

- remove $P4$
- fix a comment

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Merge new kernel files from OpenBSM 1.1: audit_fcntl.h and
audit_bsm_fcntl.c contain utility routines to map local fcntl
commands into BSM constants. Adaptation to the FreeBSD kernel
environment will follow in a future commit.

Sponsored by: Apple, Inc.
Obtained from: TrustedBSD Project
MFC after: 2 weeks