Interesting previous discussions about /usr/libexec:
http://lists.debian.org/debian-devel/2005/05/thrd2.html#00401
http://www.redhat.com/archives/rhl-devel-list/2005-May/thread.html#00240
FreeBSD has /usr/libexec[1], and it's part of historical Unix,
although I cannot find when it was first introduced. It's not in V7
which uses /usr/lib directly for auxiliary uucp binaries.
[1]
http://www.freebsd.org/doc/handbook/dirstructure.html
Rich.
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