URLHandlers are broken on harmony and J9. The reason is that they don't expect somebody to call toExternalForm from inside a URLHandlers. That causes a NPE and subsequently, we don't start-up. This fixes the issue for harmony and hopefully for J9 as well. (FELIX-893)
felix/trunk/framework/src/main/java/org/apache/felix/framework/URLHandlersStreamHandlerProxy.java