430824 - jetty-start / use of jetty-logging.xml prevents configuration of ThreadPool in jetty.xml

+ Setting <Configure> to configure itself, not Server
430823 - jetty-start / make NeedClientAuth (ssl) configurable via property

+ Added 'jetty.ssl.needClientAuth' for required client certificate auth
+ Added 'jetty.ssl.wantClientAuth' for desried client certificate auth