dnsdbq high CPU usage while waiting for curl about dnsdbq HOT 2 CLOSED

    if (debuglev > 1)
            fprintf(stderr, "io_engine(%d)\n", jobs);

    /* let libcurl run while there are too many jobs remaining. */
    still = 0;
    while (curl_multi_perform(multi, &still) == CURLM_OK && still > jobs) {
            if (debuglev > 3)
                    fprintf(stderr, "...waiting (still %d)\n", still);
            curl_multi_wait(multi, NULL, 0, 0, NULL);
    }

    /* drain the response code reports. */
    still = 0;
    while (curl_multi_info_read(multi, &still) != NULL) {
            if (debuglev > 3)
                    fprintf(stderr, "...info read (still %d)\n", still);
    }