installation and phpunit init regression caused by MDL-30667

    $currentmaxbytes = get_config('moodlecourse', 'maxbytes');
    if (isset($CFG->maxbytes)) {
        $choices = get_max_upload_sizes($CFG->maxbytes, 0, 0, $currentmaxbytes);
    } else {
        $choices = get_max_upload_sizes(0, 0, 0, $currentmaxbytes);
    }

    // If custombytes is given then add it to the list.
    if (!is_null($custombytes)) {
        if (is_number($custombytes)) {
            $custombytes = array((int)$custombytes);
        }
        $sizelist = array_unique(array_merge($sizelist, $custombytes));
    }