MFC r315636,315876,316095:
Sync libarchive with vendor

Vendor changes/bugfixes (FreeBSD-related):
r315636:
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

r315876:
Store extended attributes with extattr_set_link() if no fd is provided
Add extended attribute tests to libarchive and bsdtar
Fix tar's test_option_acls
Support the UF_HIDDEN file flag

r316095:
Constify variables in several places
Unify platform ACL code in a single source file
Fix unused variable if compiling on FreeBSD without NFSv4 ACL support

MFC r310866,310868,310870,311903,313074:
Sync libarchive with vendor.

MFC r310866:
PR #771: Add NFSv4 ACL support to pax and restricted pax

NFSv4 ACL information may now be stored to and restored from tar archives.
ACL must be non-trivial and supported by the underlying filesystem, e.g.
natively by ZFS or by UFS with the NFSv4 ACL enable flag set.

MFC r310868:
PR #843: Fix memory leak of struct archive_entry in cpio/cpio.c
PR #851: Spelling fixes
Fix two protoypes in manual page archive_read_disk.3

MFC r310870:
Use __LA_DEPRECATED macro with functions deprecated in 379867e

MFC r311903:
#691: Support for SCHILY.xattr extended attributes
#854: Spelling fixes

Multiple fixes in ACL code:
- prefer acl_set_fd_np() to acl_set_fd()
- if acl_set_fd_np() fails, do no fallback to acl_set_file()
- do not warn if trying to write ACLs to a filesystem without ACL support
- fix id handling in archive_acl_(from_to)_text*() for NFSv4 ACLs

MFC r313074:
- support extracting NFSv4 ACLs from Solaris tar archives
- bugfixes and optimizations in the ACL code
- multiple fixes in the test suite
- typo and other small bugfixes

Security fixes:
- cab reader: endless loop when parsing MSZIP signature (OSS-Fuzz 335)
- LHA reader: heap-buffer-overflow in lha_read_file_header_1()
(CVE-2017-5601)
- LZ4 reader: null-pointer dereference in lz4_filter_read_legacy_stream()
(OSS-Fuzz 453)
- mtree reader: heap-buffer-overflow in detect_form() (OSS-Fuzz 421, 443)
- WARC reader: heap-buffer-overflow in xstrpisotime() (OSS-Fuzz 382, 458)

Memory leak fixes:
- ACL support: free memory allocated by acl_get_qualifier()
- disk writer: missing free in create_filesystem_object()
- file reader: fd leak (Coverity 1016755)
- gnutar writer: fix free in archive_write_gnutar_header()
(Coverity 101675)
- iso 9660 reader: missing free in parse_file_info()
(partial Coverity 1016754)
- program reader: missing free in __archive_read_program()
- program writer: missing free in __archive_write_program_free()
- xar reader: missing free in xar_cleanup()
- xar reader: missing frees in expat_xmlattr_setup()
(Coverity 1229979-1229981)
- xar writer: missing free in file_free()
- zip reader: missing free in zip_read_local_file_header()

List of all libarchive issues at OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/list?can=1&q=libarchive

Security: CVE-2017-5601

MFC r299529,r299540,r299576,r299896:

r299529,r299540:
Update libarchive to 3.2.0

New features:
- new bsdcat command-line utility
- LZ4 compression (in src only via external utility from ports)
- Warc format support
- 'Raw' format writer
- Zip: Support archives >4GB, entries >4GB
- Zip: Support encrypting and decrypting entries
- Zip: Support experimental streaming extension
- Identify encrypted entries in several formats
- New --clear-nochange-flags option to bsdtar tries to remove noschg and
similar flags before deleting files
- New --ignore-zeros option to bsdtar to handle concatenated tar archives
- Use multi-threaded LZMA decompression if liblzma supports it
- Expose version info for libraries used by libarchive

r299576,r299896:
Fix broken cpio behavior.

Relnotes: yes