Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update libarchive to 3.0.3

Some of new features:
- New readers: RAR, LHA/LZH, CAB reader, 7-Zip
- New writers: ISO9660, XAR
- Improvements to many formats, especially including ISO9660 and Zip
- Stackable write filters to write, e.g., tar.gz.uu in a single pass
- Exploit seekable input; new "seekable" Zip reader can exploit the Zip
Central Directory when it's available; the old "streamable" Zip reader
is still fully supported for cases where seeking is not possible.

Full release notes available at:
https://github.com/libarchive/libarchive/wiki/ReleaseNotes

Update vendor libarchive dist to new "release" branch (post 3.0.3)

Git branch: release
Git commit: 9af87742342aa4f37a22ec12c4cc1c82e00ffa2f

Obtained from: https://github.com/libarchive/libarchive.git

Set svn:eol-style property to native for all text files in vendor/libarchive

Vendor import of libarchive (release/2.8, r3824)

Obtained from: http://libarchive.googlecode.com/svn/release/2.8