private static String urlToDirName(String uri) {
        return ConfigUtils.getXxhash64(ByteBuffer.wrap(Utf8.toBytes(uri)));
    }
An RPC server that handles URL download requests.

@author Lester Solbakken
config-proxy/src/main/java/com/yahoo/vespa/config/proxy/filedistribution/UrlDownloadRpcServer.java