This request is based on beta feedback.
Right now, if an error occurs in a Handler while processing
logging output, the exception is saved in the Handler with
setException and may be retrieved with getException.
However, this essentially requires any users who care about
handler exceptiosn to pool the handlers for exceptions.
It should instead be possible to register an ErrorManager object
that will be invoked when a handler error occurs.
graham.hamilton@Eng 2001-08-01