Import libucl 0.4.0
Import libucl version 2014-05-14 (almost 0.4.1)
This bring ucl_lookup_path (xpath like for ucl objects)
Make XPT_GET_TRAN_SETTINGS to report CAM that command queueing is enabled,
but make couple changes to handle non-queued commands too, if happen.

MFC after:	2 weeks
Declaration whitespace changes for style(9).

MFC after:	1 week
Naughty NANDFS was using hidden unused flag, hiding the fact that the
flag was used and wasn't really available. Change the name without
fixing any laying issues that might be present in NANDFS' use of this
flag.
Fix typo in flag name.
rm -rf can fail sometimes with an error from fts_read. Make it honor
fflag to ignore fts_read errors, but stop deleting from that directory
because no further progress can be made.

When building a kernel with a high -j value on a high core count
machine, during the cleanobj phase we can wind up doing multiple rm
-rf at the same time for modules that have subdirectories. This
exposed this race (sometimes) as fts_read can return an error if the
directory is removed by another rm -rf. Since the intent of the -f
flag was to ignore errors, even if this was a bug in fts_read, we
should ignore the error like we've been instructed to do.
xdev builds libsupc++ and libstdc++ in a slightly strange way. This
cause a race to be exposed between the two. Compensate for this race
by serializing the build/install of libstdc++ before libsupc++.
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.