The sources are derived from the trio package, version 1.9, by 
Bjorn Reese and Daniel Stenberg, which can be found at:

 http://daniel.haxx.se/trio/ 
 http://sourceforge.net/projects/ctrio/

The license on the files taken from the trio package is reproduced
below.

Matthias Clasen
20 November 2002

====

 Copyright (C) 1998-2001 by Bjorn Reese and Daniel Stenberg.

 Permission to use, copy, modify, and distribute this software for any
 purpose with or without fee is hereby granted, provided that the above
 copyright notice and this permission notice appear in all copies.

 THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
 CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.