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

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

MFC r233648:
Remove trailing whitespace per mdoc lint warning

Approved by: cperciva (implicit)

MFC r235317:

General mdoc(7) and typo fixes.

PR: 167776

MFC r227823, r228163:

Append unit number to the WMI status device name to allow attaching
multiple acpi_wmi(4) instances.

PR: kern/162491

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

Approved by: re (implicit)

Fix several typos in macros or macro misusage.

Found by: make manlint
Reviewed by: ru
Approved by: philip (mentor)

Update .Dt to reflect the fact that these drivers and man pages are
installed on more than just i386.

Replace ocurrences of FreeBSD CURRENT by FreeBSD 8.0.

MFC after: 2 days

acpi_hp.c:
- sysctl dev.acpi_hp.0.verbose to toggle debug output
- A modification so this can deal with different array lengths
when reading the CMI BIOS - now it works ok on HP Compaq nx7300
as well.
- Change behaviour to query only max_instance-1 CMI BIOS instances,
because all HPs seen so far are broken in that respect
(or there is a fundamental misunderstanding on my side, possible
as well). This way a disturbing ACPI Error Field exceeds Buffer
message is avoided.
- New bit to set on dev.acpi_hp.0.cmi_detail (0x8) to
also query the highest guid instance of CMI bios

acpi_hp.4:
- Document dev.acpi_hp.0.verbose sysctl in man page
- Document new bit for dev.acpi_hp.0.cmi_detail
- Add a section to manpage about hardware that has been reported
to work ok

Submitted by: Michael Gmelin <freebsdusb at bindone.de>
Approved by: re (kib)
MFC after: 2 weeks

Fix double path issue and other nits.

MFC after: 2 weeks

* Driver for ACPI WMI (Windows Management Instrumentation)
* Driver for ACPI HP extra functionations, which required
ACPI WMI driver.

Submitted by: Michael <freebsdusb at bindone.de>
Approved by: re
MFC after: 2 weeks