1.  Add README.txt with upgrade instructions as well as license info
    and governance.
2.  Add FREEBSD-Xlist to prune the distribution.
3.  Remove files & directories not used by FreeBSD.
Add some more IDs for Intel ATA, AHCI and USB controllers.
Handle case when ACPI reports HPET device, but does not provide memory
resource for it.  In such case take the address range from the HPET table.

This fixes hpet(4) driver attach on Asrock C2750D4I board.
ANSIfy function defintions.
Add ID for Intel Lynx Point HDMI CODEC.

Submitted by:	Dmitry Luhtionov <dmitryluhtionov@gmail.com>
Add ID for Intel Avoton SMBus controller.
Add some more Intel HDA controller IDs and rename HDMI CODEC to Haswell.
Add few more minor parts of DevSleep support from AHCI 1.3.1 proposal.
Don't allow vfs.lorunningspace or vfs.hirunningspace to be set such
that lorunningspace is greater than hirunningspace as the system
performs terribly if it is mistuned in this fashion.

MFC after:	1 week
Clean up the macros to avoid using casts.

Suggested by: bde and jhb
Fix accounting for hw.realmem on the i386 and amd64 platforms.

sys/i386/i386/machdep.c:
sys/amd64/amd64/machdep.c:
	The value reported by FreeBSD as "real memory" when booting
	doesn't match what is later reported by sysctl as hw.realmem.
	This is due to the fact that the value printed during the
	boot process is fetched from smbios data (when possible),
	and accounts for holes in physical memory. On the other
	hand, the value of hw.realmem is unconditionally set to be
	one larger than the highest page of the physical address
	space.

	Fix this by setting hw.realmem to the same value printed
	during boot, this makes hw.realmem honour it's name and
	account properly for physical memory present in the system.

Submitted by:	Roger Pau Monné
Reviewed by:	gibbs
Remove an incorrectly copied and pasted clause from these license
statements.

Approved by:	Yohanes Nugroho <yohanes@gmail.com>
MFC after:	1 week
Improve robustness of the Xen balloon driver.

sys/dev/xen/balloon/balloon.c:
	Remove unused and commented out code.

	Fix deadlock caused by performing a sleepable malloc
	while holding the balloon mutex.

	Perform proper accounting of the memory used by the domain.

Submitted by:	Roger Pau Monné
Sponsored by:	Citrix Systems R&D
Reviewed by:	gibbs
MFC after:	2 days
Merge in gcc svn r120505 to include definition of TREE_OVERFLOW_P:

http://gcc.gnu.org/viewcvs/gcc/trunk/gcc/tree.h?revision=120505&view=markup

This repairs build breakage for non x86 arch's that use gcc to build
intruduced at svn R258157
Replace CAP_POLL_EVENT and CAP_POST_EVENT capability rights (which I had
a very hard time to fully understand) with much more intuitive rights:

	CAP_EVENT - when set on descriptor, the descriptor can be monitored
		with syscalls like select(2), poll(2), kevent(2).

	CAP_KQUEUE_EVENT - When set on a kqueue descriptor, the kevent(2)
		syscall can be called on this kqueue to with the eventlist
		argument set to non-NULL value; in other words the given
		kqueue descriptor can be used to monitor other descriptors.
	CAP_KQUEUE_CHANGE - When set on a kqueue descriptor, the kevent(2)
		syscall can be called on this kqueue to with the changelist
		argument set to non-NULL value; in other words it allows to
		modify events monitored with the given kqueue descriptor.

Add alias CAP_KQUEUE, which allows for both CAP_KQUEUE_EVENT and
CAP_KQUEUE_CHANGE.

Add backward compatibility define CAP_POLL_EVENT which is equal to CAP_EVENT.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Correct right names.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Fix a couple of issues with -F:
- Fix ALWAYS_INSTALL to take precedence over the FreeBSD ID checks.
  In particular, always install a file where the only change was
  the FreeBSD ID even if -F is specified.
- Fix the -F option in the case that the only upstream change is a
  change in the FreeBSD ID and the local file is removed.
- Add tests for these two cases.
Fixed a tx watchdog chip reset that could occur on mostly idle links.
Fixed various link related issues and 10GBaseT is now linking properly.
Modified the types for the driver tunables to be consistent with the sysctl APIs.

Approved by:	davidch (mentor)
Import atf-0.17:

Experimental version released on February 14th, 2013.

* Added the atf_utils_cat_file, atf_utils_compare_file,
  atf_utils_copy_file, atf_utils_create_file, atf_utils_file_exists,
  atf_utils_fork, atf_utils_grep_file, atf_utils_grep_string,
  atf_utils_readline, atf_utils_redirect and atf_utils_wait utility
  functions to atf-c-api.  Documented the already-public
  atf_utils_free_charpp function.

* Added the cat_file, compare_file, copy_file, create_file, file_exists,
  fork, grep_collection, grep_file, grep_string, redirect and wait
  functions to the atf::utils namespace of atf-c++-api.  These are
  wrappers around the same functions added to the atf-c-api library.

* Added the ATF_CHECK_MATCH, ATF_CHECK_MATCH_MSG, ATF_REQUIRE_MATCH and
  ATF_REQUIRE_MATCH_MSG macros to atf-c to simplify the validation of a
  string against a regular expression.

* Miscellaneous fixes for manpage typos and compilation problems with
  clang.

* Added caching of the results of those configure tests that rely on
  executing a test program.  This should help crossbuild systems by
  providing a mechanism to pre-specify what the results should be.

* X-NetBSD-PR bin/45690: Make atf-report convert any non-printable
  characters to a plain-text representation (matching their
  corresponding hexadecimal entities) in XML output files.  This is to
  prevent the output of test cases from breaking xsltproc later.

Note that this import, compared to the one for 0.16, brings in all the
files that are part of the release.  This is to follow the Subversion
Primer guidelines, which mention that all files should be imported first
and only dropped when merging into contrib/atf/.

Approved by:	rpaulo (mentor)
MFV: netcat from OpenBSD 5.4.

No functional change.