MFC: r284583, r285797, r285799, r287168, r298714, r298720, r298838,
r300879

Merge ACPICA up to 20160527.

Requested by: mav

MFC: r281396, r281475

Merge ACPICA 20150410.

Relnotes: yes

MFC r272444 (by jkim):

Merge ACPICA 20140926.

MFC r278970 (by jkim):

Merge ACPICA 20141107 and 20150204.

Approved by: jkim
Relnotes: yes

Hoist all the mergeinfo up to the root in preparation for enforcing merges
to the root only. All MFC's were rerecorded to the root.

Going forward, if an MFC includes mergeinfo, it will need to be made to
the root and committed from the root. Merges with --ignore-ancestry
or diff | patch can go anywhere.

The mergeinfo in HEAD is in a bad state from years of neglect and manual
tampering and this was branched into 10.x. This confuses the coalescing
code and prevents it from doing its job.

Approved by: re (gjb, implicit)

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

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

Merge ACPICA 20130725.

Merge ACPICA 20130626.

Merge ACPICA 20130517.

Work around build breakage with GCC 4.2.

Merge ACPICA 20130117.

Merge ACPICA 20121114.

Merge ACPICA 20121018.

Merge ACPICA 20120913.

Merge ACPICA 20120816.

Merge ACPICA 20120620.

Merge multi-FIB IPv6 support from projects/multi-fibv6/head/:

Extend the so far IPv4-only support for multiple routing tables (FIBs)
introduced in r178888 to IPv6 providing feature parity.

This includes an extended rtalloc(9) KPI for IPv6, the necessary
adjustments to the network stack, and user land support as in netstat.

Sponsored by: Cisco Systems, Inc.
Reviewed by: melifaro (basically)
MFC after: 10 days

Merge ACPICA 20120215.

Merge ACPICA 20120111.

Merge ACPICA 20111123.

Merge ACPICA 20110112. Switch to BSD/GPLv2 dual license[1].

Discussed with: core [1]

Merge ACPICA 20100702.

Merge ACPICA 20100121.

Merge ACPICA 20091214.

Merge ACPICA 20091013.

Import ACPICA 20090521.

Canonify include paths again.

MFV: ACPICA 20090521

Import ACPICA 20090521 (with three patches from ACPICA GIT).

Temporarily revert system includes fixups to make future import easier.

Restore directory structures from actual vendor distribution.