Pull new version of libc++ into vendor branch.
Import new libc++.  This contains some fixes for code compiled in c++98 / c++03
mode.
Import new libc++ to vendor branch.
Vendor import of libc++ trunk r180598.
Pull new libc++ into vendor branch.
Vendor import of OpenSSH 6.4p1.

Approved by:	des
Vendor import of llvm release_34 branch r197841 (effectively, 3.4 RC3):
https://llvm.org/svn/llvm-project/llvm/branches/release_34@197841
Vendor import of clang release_34 branch r197841 (effectively, 3.4 RC3):
https://llvm.org/svn/llvm-project/cfe/branches/release_34@197841
ANSI-fy prototype.

MFC after:	2 weeks
Add an API to rendezvous all active vcpus in a virtual machine. The rendezvous
can be initiated in the context of a vcpu thread or from the bhyve(8) control
process.

The first use of this functionality is to update the vlapic trigger-mode
register when the IOAPIC pin configuration is changed.

Prior to this change we would update the TMR in the virtual-APIC page at
the time of interrupt delivery. But this doesn't work with Posted Interrupts
because there is no way to program the EOI_exit_bitmap[] in the VMCS of
the target at the time of interrupt delivery.

Discussed with:	grehan@
Add missing EM_PPC64 to e_machine header display.

MFC after:	1 week
Don't output any modifier keys before we see a valid
non-modifier key press. This prevents so-called "ghost
keyboards" keeping modifier keys pressed while not
actually seen as a real keyboard.

MFC after:	2 weeks
Support defining test program metadata from the Makefiles.

Introduce a new, per-test-program TEST_METADATA.<program> variable that
contains a list of key/value paris describing metadata properties for
that test program.  These properties are later written into the
auto-generated Kyuafile when using the KYUAFILE=auto functionality.

This is to avoid having to supply hand-crafted Kyuafiles when the needs
for metadata overrides are trivial.

While doing this, and because I am documenting TEST_METADATA, take the
chance to document the TEST_INTERFACE setting as well.

MFC after:	5 days
Support perl-based TAP-compliant test programs.

Introduce a TAP_TESTS_PERL primitive to list test programs written in perl.
Only do this in tap.test.mk because I only expect perl-based test programs
with this interface.

This is very similar to TAP_TESTS_SH but the difference is that we record
in the Kyuafile that the test program requires a perl interpreter.  This
in turn makes Kyua mark the test as skipped if the perl package is not yet
installed, instead of mysteriously failing to run the program.

MFC after:	5 days
Use TAP_TESTS_PERL to register the legacy_test in bin/pax.

Redo r260586 by using the new functionality in tap.test.mk to transparently
support perl-based test programs.

As a side-effect, we get rid of an explicit path to /usr/bin/perl by
replacing it with /usr/local/bin/perl (or as defined in tap.test.mk).

This also fixes the name of the legacy_test source file because this should
have always been legacy_test.pl and not legacy_test.sh.  My mistake when
originally moving the code around without realizing that this was a perl
script.

MFC after:	5 days
Replace hand-crafted Kyuafiles with automatic generation.

Redo r260506 by using the new TEST_METADATA functionality of bsd.test.mk
to mark the sh(1) and test(1) tests as not supporting root.  This is to
get rid of hand-crafted Kyuafiles for these very simple cases.

MFC after:	5 days
Fix bsnmpd remote denial of service vulnerability.

Reported by:	dinoex
Submitted by:	harti
Security:	FreeBSD-SA-14:01.bsnmpd
Security:	CVE-2014-1452
Disable 'monitor' feature in ntpd by default.

Security:	FreeBSD-SA-14:02.ntpd
Approved by:	so
Fix lock leak in purely hypothetical case of TCP connection without SVC_ACK
method.  This change should be NOP now, but it is better to be future safe.

Reported by:	rmacklem
libc/resolv: Use poll() instead of kqueue().

The resolver in libc creates a kqueue for watching a single file descriptor.
This can be done using poll() which should be lighter on the kernel and
reduce possible problems with rlimits (file descriptors, kqueues).

Reviewed by:	jhb