MFC r270445:
  The size of the GPT table can not be less than one sector.

MFC r270521:
  Since the size of GPT entry may differ from the sizeof(struct gpt_ent),
  use the size from GPT header to iterate entries.
MFC of 270755, 270772, 270773, 270775, 270799, 270806, 270807, 270820
Enable the build of the Intel XL710 drivers, and fixes for that build.
Fix a leak of the wired pages when unwiring of the PROT_NONE-mapped
wired region.  Rework the handling of unwire to do the it in batch,
both at pmap and object level.

All commits below are by alc.

MFC r268327:
Introduce pmap_unwire().

MFC r268591:
Implement pmap_unwire() for powerpc.

MFC r268776:
Implement pmap_unwire() for arm.

MFC r268806:
pmap_unwire(9) man page.

MFC r269134:
When unwiring a region of an address space, do not assume that the
underlying physical pages are mapped by the pmap.  This fixes a leak
of the wired pages on the unwiring of the region mapped with no access
allowed.

MFC r269339:
In the implementation of the new function pmap_unwire(), the call to
MOEA64_PVO_TO_PTE() must be performed before any changes are made to the
PVO. Otherwise, MOEA64_PVO_TO_PTE() will panic.

MFC r269365:
Correct a long-standing problem in moea{,64}_pvo_enter() that was revealed
by the combination of r268591 and r269134: When we attempt to add the
wired attribute to an existing mapping, moea{,64}_pvo_enter() do nothing.
(They only set the wired attribute on newly created mappings.)

MFC r269433:
Handle wiring failures in vm_map_wire() with the new functions
pmap_unwire() and vm_object_unwire().
Retire vm_fault_{un,}wire(), since they are no longer used.

MFC r269438:
Rewrite a loop in vm_map_wire() so that gcc doesn't think that the variable
"rv" is uninitialized.

MFC r269485:
Retire pmap_change_wiring().

Reviewed by:	alc
MFC r270803:
Document the whole settings needed to build a debug version of rtld.
MFC r270135:

Remove vestiges of previous autofs.

Discussed with:	alfred@
Sponsored by:	The FreeBSD Foundation
MFC r257985:
  Fix panic with RADIX_MPATH, when RTFREE_LOCKED() called for already
  unlocked route. Use in6_rtalloc() instead of in6_rtalloc1. This helps
  simplify the code and remove several now unused variables.

  PR:		156283
Fix ABI broken in r270576. This is direct commit to stable/10.

Reported by:	kib