@Override
        public ContentChannel handleRequest(Request request, ResponseHandler handler) {
            var ch = handler.handleResponse(new Response(OK));
            for (var value : request.headers().get(headerName)) {
                ch.write(ByteBuffer.wrap((value + "\n").getBytes()), null);
            }
            ch.close(null);
            return null;
        }
@author Oyvind Bakksjo
@author Simon Thoresen Hult
@author bjorncs
container-core/src/test/java/com/yahoo/jdisc/http/server/jetty/HttpServerTest.java