Import libarchive-2.5.4b. Major changes:
- much improved mtree support
- fix a number of non-exploitable integer and buffer overflows
- bsdtar get -s and SIGINFO/SIGUSR1 support
- fix hardlink extraction bug where latter hardlinks would overwrite the
  permissions of earlier entries even when they don't carry data
- fix bsdtar crashes on entries with empty filenames
Apply change 142518 from Perforce master to fix PR 38787:
        Minor portability enhancement; define REG_BASIC if it's not
	 already defined.
Apply change 142573 from Perforce master:
	Don't use case '1' ... '9', not ISO C.
Import libarchive-2.5.5.
Import libarchive 2.8.0:
- Infrastructure:
  - Allow command line tools as fallback for missing compression
    libraries. If compiled without gzip for example, gunzip will
    be used automatically.
  - Improved support for a number of platforms like high-resolution
    timestamps and Extended Attributes on various Unix systems
  - New convience interface for creating archives based on disk content,
    complement of the archive_write_disk interface.
- Frontends:
  - bsdcpio ready for public consumption
  - hand-written date parser replaces the yacc code
- Filter system:
  - Simplified read filter chains
  - Option support for filters
  - LZMA, XZ, uudecode handled
- Format support:
  - Write support for mtree files based on file system or archive
    content
  - Basic read support for Joliet
  - Write support for zip files
  - Write support for shar archives, both text-only and binary-safe
libarchive-2.8.2:
- Fix NULL deference for short self-extracting zip archives
- Don't dereference symlinks on Linux when reading ACLs
- Better detection of SHA2 support for old OpenSSL versions
- Fix parsing of input files for bsdtar -T
- Do not leak setup_xattr into the global namespace
- Fix build when an older libarchive is already installed
- Use O_BINARY opening files in bsdtar
- Include missing archive_crc32.h
- Correctly include iconv.h required by libxml2
libarchive-2.8.3: Build fix for Linux
Import libarchive-2.8.4:
- Improved reliability of hash function detection
- Fix issues on ancient FreeBSD, QNX, ancient NetBSD and Minix