getopts.rb - 
        $Release Version: $
        $Revision: 11708 $
        $Date: 2007-02-13 08:01:19 +0900 (Tue, 13 Feb 2007) $
        by Yasuo OHBA(SHL Japan Inc. Technology Dept.)

– this is obsolete; use getoptlong

2000-03-21 modified by Minero Aoki <aamine@dp.u-netsurf.ne.jp>

2002-03-05 rewritten by Akinori MUSHA <knu@ruby-lang.org>