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

Add support for a few more Sony-specific ACPI features (default display
brightness, wired LAN power and bass gain), and update the description of
one previously unknown feature (display contrast). While here, expand on
a comment and remove two defines left over from an old version of the code.

Also update man page to document the above changes, and correct grammar.

PR: kern/127581

Move man pages out of man4.i386. Most of them are applicable to amd64
too, so, instead of descending to the i386 directory, we add some magic to
the parent Makefile.
These man pages refer to drivers that I'm aware that work on amd64. Most
likely there are more, but I'll deal with them later.

Approved by: brueffer, philip, takawata

Document the azp for controlling audio power

Document the cdp for controlling CD power.

Approved by: cognet

Convert the SYNOPSIS section to look like the ones used in other driver
manpages, mention module support.

MFC after: 3 days

Fix warning, sort sections.

Manpage for the acpi_sony(4) driver. This is more of a dummy page at the
moment, but better than nothing.

MFC after: 3 days