Use PSWITCH_EVENT_{PRESSED,RELEASED} for consistency with other drivers
using the sysmon_power framework.

Imported envsys 2, a brief description of the new features:
(Part 2: drivers)

* Support for detachable sensors.
* Cleaned up the API for simplicity and efficiency.
* Ability to send capacity/critica

Imported envsys 2, a brief description of the new features:
(Part 2: drivers)

* Support for detachable sensors.
* Cleaned up the API for simplicity and efficiency.
* Ability to send capacity/critical/warning events to powerd(8).
* Adapted all the code to the new locking order.
* Compatibility with the old envsys API: the ENVSYS_GTREINFO
and ENVSYS_GTREDATA ioctl(2)s are supported.
* Added support for a 'dictionary based communication channel' between
sysmon_power(9) and powerd(8), that means there is no 32 bytes event
size restriction anymore.
* Binary compatibility with old envstat(8) and powerd(8) via COMPAT_40.
* All drivers with the n^2 gtredata bug were fixed, PR kern/36226.

Tested by:

blymn: smsc(4).
bouyer: ipmi(4), mfi(4).
kefren: ug(4).
njoly: viaenv(4), adt7463.c.
riz: owtemp(4).
xtraeme: acpiacad(4), acpibat(4), acpitz(4), aiboost(4), it(4), lm(4).

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clean up tadpole_request() API
from mrg

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

Consistent usage of KAUTH_GENERIC_ISSUSER.

Use the LWP cached credentials where sane.

integrate kauth.

Prefix iostat structure elements with io_

Make i/o statistics collection more generic, include tape drives and
nfs mounts in the set of devices that statistics will be reported on.

report lid and AC power state to sysmon

- use a lock to serialize tadpole_request()
- add a callback to signal monitor detection on the external VGA port
- don't call tadpole-request() in interrupt context
- use a kernel thread for various

- use a lock to serialize tadpole_request()
- add a callback to signal monitor detection on the external VGA port
- don't call tadpole-request() in interrupt context
- use a kernel thread for various not time-critical work like device
monitoring, LCD status updates, external event handling and so on
(the monitoring stuff is preliminary and to be replaced by a more generic API)

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merge ktrace-lwp.

ANSIify function declarations/defintions. Use uint<N>_t.
Drop trailing whitespace.
Same binary code is produced for GENERIC.MP + KGDB + DDB.

changed envsys support to use the sysmon API, added support for the power
button ( see powerd(8) )

Uppercase CPU, plural is CPUs.

__KERNEL_RCSID()

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

More changes for providing lwpid for ktrace (sparc GENERIC built)

Remove the `flags' argument from bus_intr_establish().

si_ -> sel_

merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes

merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

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Moved MI APM definitions into dev/apm.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.