Document how to configure XTS to use SSL

The documentation should show how to use 'https' for all communications.

I'm not sure what form the documentation should take. Given that the majority of configuration is actually related to enabling SSL for Web Services in general, I don't think it should all live in the XTS docs. Maybe we just add the XTS specific stuff there and link to the docs on how to enable SSL for WS.

We could also provide a JDF quickstart. However, the docs comprise of many bash commands, so this may not fit in well with a quickstart.

Other options are a community wiki page or blog posting.