Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Update posix1e-related man pages, especially as relates to MAC, to more
accurately reflect the last ten years of work.

Approved by: re (kib)

Add HISTORY sections to the remaining MAC library man pages.

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

Cross-reference mac(4)

Sponsored by: DARPA, Network Associates Laboratories

o Document mac_prepare() and associated functions
o Link mac_get_pid.3 to mac_get.3
o Update SEE ALSO to refer to mac_prepare, and added missing references
o Remove clause #3 on my work
o Update mac_get.3 for the updated MAC API

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

mdoc(7) police: markup overhaul.

Approved by: re

mac_free() no longer accepts a void * parameter; only mac_t's are supposed
to be passed. Point this out in a warning notice, which will eventually
go away, sometime between now and -RELEASE.

Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs

Introduce support for Mandatory Access Control and extensible
kernel access control.

Extensions to libc to provide basic MAC label manipulation facilities
for userland. These interface will be replaced in the next month
or two with more flexible interfaces, but provide sufficient support
to allow use of the Biba and MLS policies for user applications.

libc_r wrappers to follow.

Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs