[bug-gnulib] fts modules submission

[Henry Culver]

I would like to contribute an fts module for inclusion into gnulib.
Systems that are not based on glibc may not have fts_open, fts_close,
fts_read, fts_children or fts_set.  I have extracted the fts.c and
fts.h from glibc-2.3.5/io and modified them (providing a few #defines
and removing __ from calls to open, close, fchdir, and set_errno).
 
I have written an fts.m4 which includes a code block to verify
the value for USHRT_MAX, but this may be unnecessary or there may
be a better way.  I have attached a gzipped tar file with lib/fts.c
lib/fts.h, m4/fts.m4 and modules/fts.

-Henry Culver
-Culver Consulting

fts.tar.gz
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