MFC r316456,352732:

MFC r316456,352732:
Sync libarchive with vendor.

MFC r316456:
Vendor changes (FreeBSD-related):
  Report which extended attributes could not be restored
  Update archive_read_disk.3 and archive_write_disk.3 manual pages
  Plug memory leaks in xattr tests.

MFC r352732:
Relevant vendor changes:
  Issue #1237: Fix integer overflow in archive_read_support_filter_lz4.c
  PR #1249: Correct some typographical and grammatical errors.
  PR #1250: Minor corrections to the formatting of manual pages

git-svn-id: svn://svn.freebsd.org/base/stable/10@353377 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f