Fixed MANTIS-4454 (Allow newsletter/mail queue filling and queue processing to...

        flock($log_file, LOCK_UN);

    }

    // Sort the hooks into an order that makes most sense (e.g. if a Hook creates an e-mail, let it send in this same Cron request)

    $cron_hooks = find_all_hooks('systems', 'cron');

    ksort($cron_hooks);

    if (array_key_exists('tasks', $cron_hooks)) {

        $cron_hooks = array('tasks' => $cron_hooks['tasks']) + $cron_hooks;

    }

    if (array_key_exists('mail_queue', $cron_hooks)) {

        $x = $cron_hooks['mail_queue'];

        unset($cron_hooks['mail_queue']);

        $cron_hooks = $cron_hooks + array('mail_queue' => $x);

    }

    if (array_key_exists('newsletter_drip_send', $cron_hooks)) {

        $x = $cron_hooks['newsletter_drip_send'];

        unset($cron_hooks['newsletter_drip_send']);

        $cron_hooks = $cron_hooks + array('newsletter_drip_send' => $x);

    }

    // Call the hooks which do the real work

    set_value('last_cron', strval(time()));

    set_value('last_cron_started', '-', true);

    $cron_hooks = find_all_hooks('systems', 'cron');

    ksort($cron_hooks);

    foreach (array_keys($cron_hooks) as $hook) {

        if (($limit_hook != '') && ($limit_hook != $hook)) {

            continue;