to upstream.
- revert to upstream version of function prototypes for
setting the uid and gid fields of the archive_entry.
- move uid/gid overflow checks into header_common().
- use archive_set_error() instead of fprintf() for getting
error message text back to the main program.
The file timestamps in archives created by libarchive all had
dates in the year 2038. It was caused by a bit shift in
archive_write_set_format_ustar which shifted 1 instead of 1ull.
