MFC r258135: x86: Allow users to change PSL_RF via ptrace(PT_SETREGS...)

  Debuggers may need to change PSL_RF. Note that tf_eflags is already stored
  in the signal context during signal handling and PSL_RF previously could
  be modified via sigreturn, so this change should not provide any new
  ability to userspace.

  For background see the thread at:
  http://lists.freebsd.org/pipermail/freebsd-i386/2007-September/005910.html

  Reviewed by:	jhb, kib

Sponsored by:	DARPA, AFRL
MFC r257879:

Fix typo in r256646: We want to generate lists of directories in
INDEX-OLD and INDEX-NEW and compare them, not generate the same
list of directories from INDEX-OLD twice...

Pointy hats to: cperciva & everybody who didn't proofread
		EN-13:04 enough
Errata Notice:	FreeBSD-EN-13:05.freebsd-update
MFC r258620:

Pull in r195558 from upstream clang trunk:

  Fix a SSE2 intrinsics typo

  Full discourse at:

   http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20131104/092514.html
   http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-November/068124.html

  Patch by Dimitry Andric and Alexey Dokuchaev!

Reported by:	danfe
MFC r258664:

Create /var/cache with mode 0755 instead of 0750.

This directory is used by many third party applications and having
permission 0750 makes it impossible to drop group privileges.
MFC r258499:
Fix for the spurious signal handler call with zero signo in the threaded
process.
MFC: r258718: fix emulated jail_v0 byte order
MFC r256557 - kernel and userland osreldate helpers.
MFC r258347,r258349:

  Support SNI in libfetch

  SNI is Server Name Indentification which is a protocol for TLS that
  indicates the host that is being connected to at the start of the
  handshake. It allows to use Virtual Hosts on HTTPS.

PR:		kern/183583
Approved by:	bapt (implicit)
MFC r258737

In keg_dtor(), print out the keg name in the "Freed UMA keg was not empty"
message printed to the console.  This makes it easier to track down
the source of certain memory leaks.

Suggested by: adrian
MFC 253471,253620,254430,254538:
Change mmap() to more optimally use superpages and provide support for
tweaking alignment of virtual mappings.
- Add a new address space allocation method (VMFS_OPTIMAL_SPACE) for
  vm_map_find() that will try to alter the alignment of a mapping to match
  any existing superpage mappings of the object being mapped.  If no
  suitable address range is found with the necessary alignment,
  vm_map_find() will fall back to using the simple first-fit strategy
  (VMFS_ANY_SPACE).
- Change mmap() without MAP_FIXED, shmat(), shm_map(), and the GEM mapping
  ioctl to use VMFS_OPTIMAL_SPACE instead of VMFS_ANY_SPACE.
- MAP_ALIGNED(n) requests a mapping aligned on a boundary of (1 << n).
  Requests for n >= number of bits in a pointer or less than the size of
  a page fail with EINVAL.  This matches the API provided by NetBSD.
- MAP_ALIGNED_SUPER is a special case of MAP_ALIGNED.  It can be used
  to optimize the chances of using large pages.  By default it will align
  the mapping on a large page boundary (the system is free to choose any
  large page size to align to that seems best for the mapping request).
  However, if the object being mapped is already using large pages, then
  it will align the virtual mapping to match the existing large pages in
  the object instead.
- Internally, VMFS_ALIGNED_SPACE is now renamed to VMFS_SUPER_SPACE, and
  VMFS_ALIGNED_SPACE(n) is repurposed for specifying a specific alignment.
  MAP_ALIGNED(n) maps to using VMFS_ALIGNED_SPACE(n), while
  MAP_ALIGNED_SUPER maps to VMFS_SUPER_SPACE.
- mmap() of a device object now uses VMFS_OPTIMAL_SPACE rather than
  explicitly using VMFS_SUPER_SPACE.  All device objects are forced to
  use a specific color on creation, so VMFS_OPTIMAL_SPACE is effectively
  equivalent.

PR:		ports/184173 (exp-run)
MFC r258661:
Add sysctl KERN_PROC_SIGTRAMP to retrieve signal trampoline location for the
given process.
MFC r258663:
Use sysctl KERN_PROC_SIGTRAMP to retrieve the signal trampoline
location for the native amd64 ABI.  This fixes unwinding over the
signal frame after trampoline was moved to the shared page.
MFC 250661,251076,251605,252580,254976,255003,258155
port dev/qlxgbe from HEAD
Merge remote-tracking branch 'upstream/stable/9' into stable/9