#8 RuntimeExceptions in a PacketListener

[j h]

When a RuntimeException is thrown in
PacketListener.receivedPacket() it is caught in
com.microstar.SAXDriver.parse(InputSource) and re-
thrown as a SAXException.
And then the SAXException is caught in
InputStreamHandler.run() and causes disconnection.

So the client knows nothing about the RuntimeException
and gets unexpectedly disconnected.

This should be improved IMO.