Jetty configuration roundup for v3

[Tom Zeller]

>> For a single jetty-shib.xml configuration using the Jetty DSL I did :
>> <Configure id="sslContextFactory" ...
>> <Configure id="Server" ...
>> so I read that as only one<Configure />  element is allowed.
>
> I recall fighting with that same limitation and eventually worked around
> it with a single Configure root element. Here's a link to the config I
> did that contains sslContextFactory configuration, which hopefully
> you'll find helpful.
>
> https://gist.github.com/serac/5504668

Nice. A single custom config file seems better than what I ended up
with. I was hoping to stick with stock Jetty configs, but had to
override jetty-ssl.xml merely to provide a keystore path that does not
start with jetty.home, sigh.

I'll try again, using your example.