- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Revert r211288 and move the logic to the acpi_timer itself.

Consistently use full pathnames for external commands.

Do not fork a subshell unnecessarily.

Enforce ACPI timer as the timecounter hardware before we change sleep state
unless it is the current timer. When we have resumed successfully, restore
the previous timecounter hardware if it was changed earlier. Only the ACPI
timer is guaranteed to increase monotonically between S-state changes.

With uart(4) default, change sio# to uart# so that
out-of-the-box FreeBSD is consistent.

Update the suspend/resume user API while maintaining backwards compat.

Improvements:
* /etc/rc.suspend,rc.resume are always run, no matter the source of the
suspend request (user or kernel, apm or acpi)
* suspend now requires positive user acknowledgement. If a user program
wants to cancel the suspend, they can. If one of the user programs
hangs or doesn't respond within 10 seconds, the system suspends anyway.
* /dev/apm is clonable, allowing multiple listeners for suspend events.
In the future, xorg-server can use this to be informed about suspend
even if there are other listeners (i.e. apmd).

Changes:
* Two new ACPI ioctls: REQSLPSTATE and ACKSLPSTATE. Request begins the
process of suspending by notifying all listeners. acpi is monitored by
devd(8) and /dev/apm listener(s) are also counted. Users register their
approval or disapproval via Ack. If anyone disapproves, suspend is vetoed.
* Old user programs or kernel modules that used SETSLPSTATE continue to
work. A message is printed once that this interface is deprecated.
* acpiconf gains the -k flag to ack the suspend request. This flag is
undocumented on purpose since it's only used by /etc/rc.suspend. It is
not intended to be a permanent change and will be removed once a better
power API is implemented.
* S5 (power off) is no longer supported via acpiconf -s 5 or apm -z/-Z.
This restores previous behavior of halt/shutdown -p being the interface.
* Miscellaneous improvements to error reporting

Approved by: re

Make sure pid file creation doesn't complain if it can't create the file.
This removes a warning message when suspending is called by a non-root
user.

Add support for /etc/rc.suspend and /etc/rc.resume for ACPI. They are
called directly from acpiconf(8). Change both scripts to take a
subsystem (apm|acpi) and sleep level (suspend,standby|1-5) argument.

Add copyright notices. Other systems have been barrowing our /etc files
w/o giving any credit.

Apply a consistent style to most of the etc scripts. Particularly, use
case instead of test where appropriate, since case allows case is a sh
builtin and (as a side-effect) allows case-insensitivity.

Changes discussed on freebsd-hackers.

Submitted by: Doug Barton <Doug@gorean.org>

$Id$ -> $FreeBSD$

Put apmd configuration and rc files in /etc.
Update some files for apmd.