Upgraded to Jetty 9.0.5:

- this makes this bundle no longer runnable on Java 6 and below;
- Jetty 9 no longer explicitly needs to be configured to use NIO,
  this is handled internally in Jetty;
- still needs some additional TLC to see where we can improve the
  implementation to use the latest features of Jetty.



git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1530049 13f79535-47bb-0310-9956-ffa450edef68