strfmon: reduce unnecessary snprintf.

No need for the snprintf/asprintf dance; use fixed width formats.

Obtained from:	NetBSD (CVS rev. 1.8)
MFC after:	1 week
Clear nonblock and async on devctl close instaed of open.

This is a purely cosmetic change.
Add bsd.dtrace.mk to obsolete files.

MFC after:	3 weeks.
sh: Correctly handle positional parameters beyond INT_MAX on 64-bit systems.

Currently, there can be no more than INT_MAX positional parameters. Make
sure to treat all higher ones as unset to avoid incorrect results and
crashes.

On 64-bit systems, our atoi() takes the low 32 bits of the strtol() and
sign-extends them.

On 32-bit systems, the call to atoi() returned INT_MAX for too high values
and there is not enough address space for so many positional parameters, so
there was no issue.
Merge several equal serialization indexes.
Fix performance problems with AXGE network adapter in RX direction:
- Remove 4 extra bytes from the ethernet payload.
- The maximum RX buffer was incorrectly set. Increase it to 64K for
now, until the exact limit is understood.
- Enable hardware checksumming again.
- Make hardware data structure packed.

MFC after:	3 days
Turn off blinking device leds at attach.

MFC after:	3 days
PR:		183735
Add a headphone redirection quirk for the Lenovo G580.

MFC after:	1 week
Unbreak with gcc.

I'm tired to see tinderbox spamming.  Feel free to fix it your way.
Whitespace.
* Use the volatile qualifier for 'tiny' to prevent compilers
  from erronously constant folding expressions of the form
  '1 - tiny'.  This allows erf[f](x) to raise INEXACT.

* Use 0.5, 1, and 2, which are exactly representable in radix-2
  floating point formats.  This reduces diffs between s_erf[fl].c.

* While here, add a comment about efx and efx8.
* Update the comments that refer to erf[c](nan) and erf[c](+-inf)
  to use erf[c]f.
* Use 9 digits instead of 11 digits in efx and efx8.

* Update the domain and range of comments for the polynomial
  approximations, including using the the correct variable names
  (e.g., pp(x) instead of p(x)).

* Use hex values of the form 0x3e0375d4 instead of 0x1.06eba8p-3,
  which was obtained from printf("%.6a").

* In the domain [0.84375, 1.25], qa(x) can be reduced from a 4th
  order polynomial to 3rd order.

* In the domain [1.25,1/0.35], sa(x) can be reduced from a 4th
  order polynomial to 3rd order.

* In the domain [1/0.35, 11], the 4th order polynomials rb(x) and
  sb(x) can be reduced to 2nd and 3rd order, respectively.
Implement pmap_unwire().  See r268327 for the motivation behind this change.
* Makefile:
  . Add s_erfl.c to building libm.
  . Add MLINKS for erfl.3 and erfcl.3.

* Symbol.map:
  . Move erfl and erfcl to their proper location.

* ld128/s_erfl.c:
  . Implementations of erfl and erfcl in the IEEE 754 128-bit format.

* ld80/s_erfl.c:
  . Implementations of erfl and erfcl in the Intel 80-bit format.

* man/erf.3:
  . Document the new functions.
  . While here, remove an incomplete sentence.

* src/imprecise.c:
  . Remove the stupidity of mapping erfl and erfcl to erf and erfc.

* src/math.h:
  . Move the declarations of erfl and erfcl to their proper place.

* src/s_erf.c:
  . For architectures where double and long double are the same
    floating point format, use weak references to map erfl to
    erf and ercl to erfc.

Reviewed by:	bde (many earlier versions)
Eliminate an unused variable.  Refresh two comments.
* Update the comments to agree with commit r226595.

* While here, fix a nearby typo in a comment.
Explicitly disable the build of tests when building bmake.

During "make buildworld", building bmake is (one of) the very first steps
and we should not be building any of its tests.  Conceptually, this is the
right thing to do 1) for build simplicity reasons and 2) because there is
no need to build any tests this early on.

In practice, this fixes tinderbox builds of CURRENT from 9.x when MK_TESTS
is enabled.  This is because bsd.test.mk needs some modern bmake features
not present in 9.x (:tW) and tinderbox is forcing the build to use the
CURRENT share/mk files from the very beginning (see r266617).  By skipping
the build of the tests when still using the host make, we omit the problem.
Arguably, what tinderbox is doing is wrong and needs to be addressed, but
that is a separate issue.
Invoke the DTrace trap handler before calling trap() on amd64. This matches
the upstream implementation and helps ensure that a trap induced by tracing
fbt::trap:entry is handled without recursively generating another trap.

This makes it possible to run most (but not all) of the DTrace tests under
common/safety/ without triggering a kernel panic.

Submitted by:	Anton Rang <anton.rang@isilon.com> (original version)
Phabric:	D95
Make bind(2) and connect(2) return EAFNOSUPPORT for AF_UNIX on wrong
address family.

See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191586 for the
original discussion.

Reviewed by:	terry