Typo means that this couldn't have possibly fixed anything, so revert
r268377.
Make synopsis version of -3 flag match other uses in the page.

MFC after:	1 week
Correct si_code for the SIGBUS signal generated by the alignment trap.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Correct the problem reported by test16 from
tools/regression/file/flock/flock.c, which completes the fix in
r192685.  When the lock was stolen from us, retry the whole lock
sequence in kernel, instead of returning EINTR to usermode and hoping
that application would handle it correctly by restarting the lock
acquire.

Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Make this compilable on latest Linux'es without warnings.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Fix task management functions status: task not found is not an error,
while not implemented function is.
Add XPT_ABORT support to iSCSI initiator.

While CAM does not use it normally, it is useful for targets testing.

MFC after:	2 weeks
Return task management requests to queued execution, but differently.

Testing shown that both original queued design with separate task queue,
and recent direct execution design had significant flaw: If abort request
arrives just after the victim, the last one may not be in the ooa_queue
yet, and so invisible for the task management function.

Unlike original queued implementation, use same queue for all SCSI and
TASK requests from the same initiator. That avoids races between them:
task functions are always executed in proper time, relatively to other
requests.
Do not return statuses for aborted iSCSI commands.
[mdoc] Fix previous change.
Pass correct command that should be aborted to ISPCTL_ABORT_CMD.

This makes XPT_ABORT to work for me on initiator side of isp(4).
Previous code was trying to abort the XPT_ABORT itself and failed.

MFC after:	1 week
Fix typo in r267873.
Use named constant rather than '0' to access the reset controller register.
Support CXXFLAGS.${MACHINE_ARCH} as well as CFLAGS.  This allows different
C++ options for toolchain versus target when cross-building.
Document r268351, end of ia64 support.

Sponsored by:	The FreeBSD Foundation
Drop leading 'r' in revision number from previous commit.

Sponsored by:	The FreeBSD Foundation
Document r268303, MacMini 3,1 support in asmc(4).

Sponsored by:	The FreeBSD Foundation
Document r267359, disklabel64 partitioning scheme.

Sponsored by:	The FreeBSD Foundation
Fix non-version text after .Fx macro usage.

Sponsored by:	The FreeBSD Foundation
Document r266770, Intel Centrino Wireless-N 105 support.

Sponsored by:	The FreeBSD Foundation