httpsServer.setHttpsConfigurator(new HttpsConfigurator(context) {
            @Override
            public void configure(HttpsParameters params) {
                SSLContext c = getSSLContext();
                SSLEngine engine = c.createSSLEngine();
                params.setNeedClientAuth(needClientAuth);
                params.setCipherSuites(engine.getEnabledCipherSuites());