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)

Revise markup in recently added manpages.

Following repo-copy of mac_is_present_np.3 to mac_is_present.3, remove
old file, update references, etc. The C function is already named
mac_is_present().

Obtained from: TrustedBSD Project

Forced commit to recognize repo-copy of mac_is_present_np.3 to
mac_is_present.3.

Thanks to: simon
Obtained from: TrustedBSD Project

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: Added the missing .Os call; it's not strictly
necessary nowadays, but is documented as "required", and may
become so again in the future.

Approved by: re

mdoc(7) police: markup overhaul.

Approved by: re

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