Vendor import of byacc 20120526

Approved by:	des (mentor, implicit)
Import byacc 20130304
Remove some of the code required for supporting ssm(4) on SPARC in favor
of a more PowerPC/FDT-focused design. Whenever SPARC64 is integrated
into this rework, this should be (trivially) revisited.
Cleanup empty directories

PR:	conf/167133
Fix panic in the tap driver when a tap and vmnet interface were
created after each other e.g.

 ifconfig tap0
 ifconfig vmnet0
 <panic>

Appears to be a cut'n'paste error from the tap code to the vmnet
code where the name string wasn't updated in the call to make_dev().

Reviewed by:	glebius
MFC after:	3 days
Fix build host pollution by avoiding calling 'uname -srp' to
determine values for 'VERSION'.

Looked at by:	cperciva
ELF PowerPC64 ABI puts the LR save word at 16 byte offset, not 8.
Initialize inc_fibnum for properly handling ICMP6_PACKET_TOO_BIG errors
in multifib environment.

PR:		183265
MFC after:	1 week
Queisce quite a few clang warnings -Wdangling-else due to this work around
for compiling gperf under Visual Studio from 1998.

ref. http://msdn.microsoft.com/en-us/library/b80153d8%28v=vs.90%29.aspx
ref. http://stackoverflow.com/questions/984878/what-is-the-possible-use-for-define-for-if-false-else-for
Fix bug in the ioapic emulation for level-triggered interrupts,
where a pin assertion while a source was masked would result in
the interrupt being lost, with the symptom being a console hang.
The condition is now recorded, and the interrupt generated when
the source is unmasked.

Discovered by:	OpenBSD 5.4 MP
Reviewed by:	neel
MFC after:	3 days
Be a little more suspicious of thermal sensors, which can have single
crazy readings occasionally. One wild reading should not be enough to
trigger a shutdown, so instead wait for several concerning readings in
a row.

PR:		powerpc/180593
Submitted by:	Julio Merino
MFC after:	1 week
Add a configuration file and hints file for the Alfa Networks Hornet UB
board.

This is another AR9331 board similar to the Carambola2. It has different
ethernet and LED wiring though.

They make a variety of boards that mostly differ on the amount of RAM/flash
available.  Alfa Networks graciously donated a handful of 64MB RAM/16MB flash
boards so I can finish off 802.11s support for the AR93xx chips and do up
a tech demonstration with it.

This is enough to bring up the board.

Tested:

* Alfa networks UB Hornet board - 64MB ram, 16MB flash version.

Thankyou to Alfa Networks for the development boards!

Sponsored by:	Alfa Networks (hardware only)
Allow mixing bsd.files.mk with bsd.subdir.mk.

If a single Makefile wants to recurse into subdirectories and also
wants to install files, bsd.files.mk's targets would get ignored in
favor of those defined by bsd.subdir.mk because installfiles would
not get defined in bsd.files.mk.

Prevent this from happening by defining the targets in bsd.files.mk
with auxiliary names and listing them as dependencies of installfiles
instead.

This is required by bsd.test.mk, which needs to install a Kyuafile
in pretty much all cases but may also need to recurse into
subdirectories for build purposes.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Move the TESTSBASE definition to bsd.own.mk.

We need to be able to reference the value of TESTSBASE without requiring
the inclusion of bsd.test.mk (e.g. in etc/Makefile), so move its definition
to the more generic bsd.own.mk.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Set up the /usr/tests hierarchy.

Populate /usr/tests with the only test programs that currently live
in the tree (those in lib/libcrypt/tests/) and add all the build
machinery to accompany this change.

In particular:

- Add a WITHOUT_TESTS variable that users can define to request that
  no tests be put in /usr/tests.
- Add a top-level Kyuafile for /usr/tests and a way to create similar
  Kyuafiles in top-level subdirectories.
- Add a BSD.tests.dist file to define the directory layout of
  /usr/tests.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Add missing WITHOUT_TESTS file.

Submitted by:	Julio Merio jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Add missing plain.test.mk.

Submitted by:	Julio Merino jmmv google.com
MFC after:	2 weeks
Add a tests(7) manual page.

This manual page intends to describe the structure and behavior of
the FreeBSD test suite installed in /usr/tests.  The contents have
been inherited from the NetBSD manual page.

As a side effect, this also updates the hier(7) manual page to
mention /usr/tests and points at tests(7) for more details.

Submitted by:	Julio Merino jmmv google.com
Reviewed by:	sjg
MFC after:	2 weeks
Disable WITH_TESTS= for now.
Add clang-CC and CC to list of hints allowing clang to identify its operating
mode as c++ instead of defaulting to c for the binary names CC and clang-CC.

This fixes builds that use cmake, which automatically sets CXX to
/usr/bin/CC by default.

PR:		bin/182442
Reviewed by:	dwhite, wca
MFC after:	2 days