ImplicitIOHandler is a read-only Boolean property that indicates if the
ServerIOHandler was created as as result of the server becoming
Active. ImplicitIOHandler will contain True when an object instance is assigned during activation of the listening thread for the server. ImplicitIOHandler will contain False when the
ServerIOHandler has been expressedly assigned by the application.
ImplicitIOHandler is used in the Destroy destructor to determine if the object instance must free the resources allocated in ServerIOHandler prior to destruction.