||This is a duplicate (with minor modifications)
of the log4j 1.2.15 DOMConfigurator
renamed for use with earlier versions of log4j.
||All Plugin events are encapsulated in this class, which
simply contains the source Plugin, but may in future include more
||This is a registry for Plugin instances.
||A convienent abstract class for plugin subclasses that implements
the basic methods of the Plugin interface.
||Defines the base class for Receiver plugins.