Defines ParserWriterChooseMixin, which makes it possible to choose a different XML writer and/or XML parser then the default one. The Mixin is used in client.rb (class Client) and server.rb (class BasicServer)
Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de)
$Id: utils.rb 27537 2010-04-28 18:51:35Z jeg2 $