Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r266103

Update dis_tables.c to the latest Illumos version.

This includes decodes of recent Intel instructions, in particular
VT-x and related instructions. This allows the FBT provider to
locate the exit points of routines that include these new
instructions.

Illumos issues:
3414 Need a new word of AT_SUN_HWCAP bits
3415 Add isainfo support for f16c and rdrand
3416 Need disassembler support for rdrand and f16c
3413 isainfo -v overflows 80 columns
3417 mdb disassembler confuses rdtscp for invlpg
1518 dis should support AMD SVM/AMD-V/Pacifica instructions
1096 i386 disassembler should understand complex nops
1362 add kvmstat for monitoring of KVM statistics
1363 add vmregs[] variable to DTrace
1364 need disassembler support for VMX instructions
1365 mdb needs 16-bit disassembler support

This corresponds to Illumos-gate (github) version
eb23829ff08a873c612ac45d191d559394b4b408

MFC r262543:
Fix the struct reg mappings for i386 and amd64, which differ between illumos
and FreeBSD.

MFC r262542:
Move some files that are identical on i386 and amd64 to an x86 subdirectory
rather than keeping duplicate copies.

Move some files that are identical on i386 and amd64 to an x86 subdirectory
rather than keeping duplicate copies.

Discussed with: avg
MFC after: 1 week