MFV r315633, 315635:

MFV r315633, 315635:

Sync libarchive with vendor

Vendor changes/bugfixes (FreeBSD-related):
  PR 867 (bsdcpio): show numeric uid/gid when names are not found
  PR 870 (seekable zip): accept files with valid ZIP64 EOCD headers
  PR 880 (pax): Fix handling of "size" pax header keyword
  PR 887 (crypto): Discard 3072 bytes instead of 1024 of first keystream
  OSS-Fuzz issue 806 (mtree): rework mtree_atol10 integer parser
  Break ACL read/write code into platform-specific source files
  Unbreak static dependency on libbz2

MFC after:	1 week