Revert "Revert "Upgrade Jetty to version 9.4.11""
Revert "Revert "Upgrade Jetty to version 9.4.11""

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa