directory at the same level as 'foo' called 'bar'. (e.g, a definition
of usr/obj exists, and a def for usr/bin, but none for usr/obj/bin. don't
warn about usr/obj/bin because of the usr/bin entry).
Fix from enami tsugutomo <enami@ba2.so-net.or.jp> in [bin/3365]
specification, but _not_ in the file hierarchy. contrib'd by:
Ed Symanzik <zik@enoch.cl.msu.edu>. Man page adjustment to match, and
minor man page cleanup, by me.