Vendor changes (FreeBSD-related):
- store extended attributes with extattr_set_link() if no fd is provided
- add extended attribute tests to libarchive and bsdtar
- support the UF_HIDDEN file flag
Important vendor bugfixes (relevant to FreeBSD):
#821: tar -P cannot extract hardlinks through symlinks
#825: Add sanity check of tar "uid, "gid" and "mtime" fields
Vendor issues fixed:
PR #777: Multiple bugfixes for setup_acls()
This fixes a bug that caused ACLs not to be read properly for files and
directories inside subdirectories and as a result not being stored in tar
archives.