Fix previous commit when option RACCT is not used.

MFC after:	7 days
In pmap_mapdev(), if the physical memory range is not covered by an EFI
memory descriptor, don't return NULL as the virtual address, return the
direct-mapped uncacheable virtual address for it. At first, this was
needed only for the Altix 350, but now even some high-end HP machines
have devices mapped to physical addresses that aren't covered by the
EFI memory map.
In ia64_mca_init(), don't limit the allocation of the info block to
fall within the first 256MB of memory. The origin/reason for that
limitation is not known, but it's not believed to be required for
proper initialization. What is known is that the Altix 350 does not
have physical memory at that address (by virtue of the address space
bits).

Keep the boundary at 256MB so that the info block will be covered
by a single direct-mapped translation.

While here, change the flags to M_NOWAIT to eliminate confusion. It
does not change the behaviour of contigmalloc(). What is does is
makes the flags argument explicitly say what the actual behaviour
is.
In pci_cfgregread() and pci_cfgregwrite(), multiplex the domain and
bus number into the bus argument. The bus number occupies the least
significant 8 bits. The PCI domain occupies the most significant 24
bits.

On the Altix 350, the PCI domain is a required parameter, but
changing the prototype of the pci_cfgreg*() functions to include a
separate domain argument has wide-spread consequences across the
supported architectures. We'd be changing a known interface.

Multiplexing is an acceptable kluge to give us what we need with
manageable impact. Note that the PCI bus number fits in 8 bits,
so the multiplexing of the domain is a backward compatible change.
Add isnan() and isinf() to the global namespace in libstdc++'s <cmath>.

The standard (n3242, section 17.6.1.1, paragraph 4) says that, because these are
declared as macros in the C specification (even though they are
implemented as functions in the C++ library) they should be in the global
namespace.

A surprising number of configure checks rely on this.  It was broken by recent
cleanups to math.h.
Add constant for PPP-Max-PayLoad tag.

Submitted by:	Dmitry Luhtionov <dmitryluhtionov gmail.com>
Revert r249590 and in case if mp_ncpus isn't initialized use MAXCPU. This
allows us to init counter zone at early stage of boot.

Reviewed by:	kib
Tested by:	Lytochkin Boris <lytboris gmail.com>
Remove ftp2.tr.freebsd.org, it is out of date.

MFC after:	3 days
Fix the usage error message.  The valid range is up to max. vlan - 1 since vlangroups starts at 0.

Approved by:	adrian (mentor)
Add a new flag (ETHERSWITCH_VID_VALID) to say what vlangroups are in use.
This fix the case when etherswitch is printing the information of port 0
vlan group (in port based vlan mode) with no member ports.

Add the ETHERSWITCH_VID_VALID support to ip17x driver.

Add the ETHERSWITCH_VID_VALID support to rt8366 driver.

arswitch doesn't need to be updated as it doesn't support vlans management
yet.

Approved by:	adrian (mentor)
Fix the arswitch instability problem.  It turns out that the
arswitch_writereg() routine was writing the registers in the wrong order.

Revert -r241918 as the root problem is now fixed. Remove another workaround
from arswitch_ar7240.c.

Simplify and fix the code on arswitch_writephy() by using
arswitch_writereg().

While here remove a redundant declaration from arswitchvar.h.

Approved by:	adrian (mentor)
Remove the large part of struct ipsecstat. Only few fields of this
structure is used, but they already have equal fields in the struct
newipsecstat, that was introduced with FAST_IPSEC and then was merged
together with old ipsecstat structure.

This fixes kernel stack overflow on some architectures after migration
ipsecstat to PCPU counters.

Reported by:	Taku YAMAMOTO, Maciej Milewski
Add the support for 802.1q and port based vlans for arswitch.

Tested on: RB450G (standalone ar8316), RSPRO (standalone ar8316) and
TPLink MR-3220 (ar724x integrated switch).

Approved by:	adrian (mentor)
Obtained from:	zrouter
tmpfs works perfectly fine with -o union -- there is no reason to exclude it
from the list of options.
Generate debug data release dist sets

If WITH_DEBUG_FILES is set the standalone debug data will be excluded
from each ${dist}.txz and placed in a ${dist}.debug.txz.

Submitted by:	gjb
Reviewed by:	brooks
wordexp(): Fix syntax validation for backslashes in single-quotes.
Fix a bug introduced in r252646 that causes a page with the PG_PTE_PAT bit set
to be interpreted as a superpage. This is because PG_PTE_PAT is at the same
bit position in PTE as PG_PS is in a PDE.

This caused a number of regressions on amd64 systems: panic when starting
X applications, freeze during shutdown etc.

Pointy hat to:	me
Tested by: gperez@entel.upc.edu, joel, dumbbell
Reviewed by: kib
 - Correct a stale comment.  We don't have vclean() anymore.  The work is
   done by vgonel() and destroy_vobject() should only be called once from
   VOP_INACTIVE().

Sponsored by:	EMC / Isilon Storage Division
Add support for emulation of the "or r/m, imm8" instruction.

Submitted by:	Zhixiang Yu (zxyu.core@gmail.com)
Obtained from:	GSoC 2013 (AHCI device emulation for bhyve)
 - Remove the long obsolete 'vm_pageout_algorithm' experiment.

Discussed with:	alc
Sponsored by:	EMC / Isilon Storage Division