Copyright (c) 2000-2021, Brian Smith <brian@dbsoft.org>
Copyright (c) 2003-2020, Mark Hessling <mark@rexx.org>
Copyright (c) 2007, Alex Taylor
Copyright (c) 2002, Nickolay V. Shmyrev <shmyrev@yandex.ru>
Copyright (c) 2000, Achim Hasenmueller <achimha@innotek.de>
Copyright (c) 2000, Peter Nielsen <peter@pmview.com>
Copyright (c) 1998, Sergey I. Yevtushenko
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