s/file system/filesystem/g

Based on r96755 from UFS.

MFC after:	3 days
Make the default choice for FTP media access use "auto".
Don't update provider properties and don't set DISKFLAG_OPEN if d_open()
disk method call returned error.  GEOM considers devices in such case as
still closed, and won't call symmetric d_close() for them.
Store a reference to the vnode associated with a file descriptor in the
linux_file structure and use it instead of directly accessing td_fpop
when destroying the linux_file structure.  The td_fpop pointer is not
valid when a cdevpriv destructor is run, and the type-specific close
method has already been called, so f_vnode may not be valid (and the
vnode might have been recycled without our own reference).

Tested by:	Julian Stecklina <jsteckli@os.inf.tu-dresden.de>
MFC after:	1 week
Move the check whether the clear flag is set. This has 2 advantages

- When operating on a core file (-M) and -c is specified we don't clear
  the message buffer of the running system.
- If we don't have permission to clear the buffer print the error message
  only. That's what Linux does in this case, where this feature was ported
  from, and it ensures that the error message doesn't get lost in the noise.

Discussed with:	antoine, cognet
Approved by:	cognet
Prevent races running the queue by serializing access to the
queue directory.

PR:		bin/113239
Add the name of the file that could not be opened to the error message
regarding the failure.

Suggested while working on PR bin/113239.
MFV r251619:

ZFS needs better comments.

Illumos ZFS issues:
  3741 zfs needs better comments

MFC after:      2 weeks
Bump the CPU/WCPU column width by one so that it fits values from 100% up
to 999.99% CPU.  It still won't be aligned if you have a multithreaded
process using more than 1000% CPU (e.g. idle process on an idle 12-way
system), but 100% is a common case.

Submitted by:	Jeremy Chadwick (partial)
MFC after:	1 week
MFV r251620:

ZFS comments need cleaner, more consistent style

Illumos ZFS issues:
  3741 zfs comments need cleaner, more consistent style

MFC after:      2 weeks
MFV r251621:

ZFS needs a refcount audit

Illumos ZFS issues:
  3741 zfs needs a refcount audit

MFC after:      2 weeks
MFV r251622:

ZFS shouldn't ignore errors unmounting snapshots

Illumos ZFS issues:
  3744 zfs shouldn't ignore errors unmounting snapshots

MFC after:      2 weeks
MFV r251623:

zpool create should treat -O mountpoint and -m the same

Illumos ZFS issues:
  3745 zpool create should treat -O mountpoint and -m the same

MFC after:      2 weeks
MFV r251624:

txg commit callbacks don't work

Illumos ZFS issues:
  3747 txg commit callbacks don't work

MFC after:      2 weeks
MFV r251626:

ZFS event processing should work on R/O root filesystems

Illumos ZFS issues:
  3749 zfs event processing should work on R/O root filesystems

MFC after:      2 weeks
Borrow the algorithm from kvm_getprocs() to fix procstat_getprocs() to
handle the case where the process tables grows in between the calls to
fetch the size and fetch the table.

MFC after:	1 week
cxgbe/tom: Allow caller to select the queue (control or data) used to
send the CPL_SET_TCB_FIELD request in t4_set_tcb_field().

MFC after:	1 week
pthread_testcancel(3): Update list of cancellation points.

This should be a fairly complete list of cancellation points in libc, libthr
and librt, including standard as well as non-standard functions.
Merge latest NetBSD changes.
This adds some new NetBSD releases and makes some simple formatting changes.

With this commit NetBSD and FreeBSD should have identical files.
DragonflyFBSD has the version immediately prior to this commit.

When committing to this file please try to coordinate with all three groups.

Submitted by:	Alan Barrett <apb@cequrux.com>