Revised sort utility

[Tim Robbins]

I announced my BSD-licensed reimplementation of sort(1) on this list a few
months ago. Since then I've fixed many bugs found by my own testing and
the GNU textutils test suite, and vastly improved performance for many
common cases (e.g. the "fast path" is now qsort() -> memcmp()).

The new version is available at http://people.freebsd.org/~tjr/sort2.tar.gz .
Comments/patches are welcome.


Tim