moodle/admin/settings/subsystems.php

<?php

if ($hassiteconfig) { // speedup for non-admins, add all caps used on this page

    $optionalsubsystems->add(new admin_setting_configcheckbox('enableoutcomes', new lang_string('enableoutcomes', 'grades'), new lang_string('enableoutcomes_help', 'grades'), 0));
    $optionalsubsystems->add(new admin_setting_configcheckbox('usecomments', new lang_string('enablecomments', 'admin'), new lang_string('configenablecomments', 'admin'), 1));

    $optionalsubsystems->add(new admin_setting_configcheckbox('usetags', new lang_string('usetags','admin'),new lang_string('configusetags', 'admin'), '1'));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enablenotes', new lang_string('enablenotes', 'notes'), new lang_string('configenablenotes', 'notes'), 1));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enableportfolios', new lang_string('enabled', 'portfolio'), new lang_string('enableddesc', 'portfolio'), 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enablewebservices', new lang_string('enablewebservices', 'admin'), new lang_string('configenablewebservices', 'admin'), 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('messaging', new lang_string('messaging', 'admin'), new lang_string('configmessaging','admin'), 1));

    $optionalsubsystems->add(new admin_setting_configcheckbox('messagingallusers',
        new lang_string('messagingallusers', 'admin'),
        new lang_string('configmessagingallusers', 'admin'),
        0)
    );

    $optionalsubsystems->add(new admin_setting_configcheckbox('messagingdefaultpressenter',
        new lang_string('messagingdefaultpressenter', 'admin'),
        new lang_string('configmessagingdefaultpressenter', 'admin'),
        1)
    );

    $options = array(
        DAYSECS => new lang_string('secondstotime86400'),
        WEEKSECS => new lang_string('secondstotime604800'),
        2620800 => new lang_string('nummonths', 'moodle', 1),
        7862400 => new lang_string('nummonths', 'moodle', 3),
        15724800 => new lang_string('nummonths', 'moodle', 6),
        0 => new lang_string('never')
    );
    $optionalsubsystems->add(new admin_setting_configselect(
        'messagingdeletereadnotificationsdelay',
        new lang_string('messagingdeletereadnotificationsdelay', 'admin'),
        new lang_string('configmessagingdeletereadnotificationsdelay', 'admin'),
        604800,
        $options)
    );
    $optionalsubsystems->add(new admin_setting_configselect(
        'messagingdeleteallnotificationsdelay',
        new lang_string('messagingdeleteallnotificationsdelay', 'admin'),
        new lang_string('configmessagingdeleteallnotificationsdelay', 'admin'),
        2620800,
        $options)
    );

    $optionalsubsystems->add(new admin_setting_configcheckbox('messagingallowemailoverride', new lang_string('messagingallowemailoverride', 'admin'), new lang_string('configmessagingallowemailoverride','admin'), 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enablestats', new lang_string('enablestats', 'admin'), new lang_string('configenablestats', 'admin'), 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enablerssfeeds', new lang_string('enablerssfeeds', 'admin'), new lang_string('configenablerssfeeds', 'admin'), 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enableblogs', new lang_string('enableblogs', 'admin'), new lang_string('configenableblogs', 'admin'), 1));

    $options = array('off'=>new lang_string('off', 'mnet'), 'strict'=>new lang_string('on', 'mnet'));
    $optionalsubsystems->add(new admin_setting_configselect('mnet_dispatcher_mode', new lang_string('net', 'mnet'), new lang_string('configmnet', 'mnet'), 'off', $options));

    // Conditional activities: completion and availability
    $optionalsubsystems->add(new admin_setting_configcheckbox('enablecompletion',
        new lang_string('enablecompletion','completion'),
        new lang_string('configenablecompletion', 'completion'), 1));

    $options = array(
        1 => get_string('completionactivitydefault', 'completion'),
        0 => get_string('completion_none', 'completion')
    );
    $optionalsubsystems->add(new admin_setting_configselect('completiondefault', new lang_string('completiondefault', 'completion'),
            new lang_string('configcompletiondefault', 'completion'), 1, $options));

    $optionalsubsystems->add($checkbox = new admin_setting_configcheckbox('enableavailability',
            new lang_string('enableavailability', 'availability'),
            new lang_string('enableavailability_desc', 'availability'), 1));
    $checkbox->set_affects_modinfo(true);

    $optionalsubsystems->add(new admin_setting_configcheckbox('enableplagiarism', new lang_string('enableplagiarism','plagiarism'), new lang_string('configenableplagiarism','plagiarism'), 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enablebadges', new lang_string('enablebadges', 'badges'), new lang_string('configenablebadges', 'badges'), 1));

    $optionalsubsystems->add(new admin_setting_configcheckbox('enableglobalsearch', new lang_string('enableglobalsearch', 'admin'),
        new lang_string('enableglobalsearch_desc', 'admin'), 0, 1, 0));

    $optionalsubsystems->add(new admin_setting_configcheckbox('allowstealth', new lang_string('allowstealthmodules'),
        new lang_string('allowstealthmodules_help'), 0, 1, 0));
}