wp-fast-ajax-shortinit-wp-settings.php

<?php
// wp-settings.php:118

// Initialize multisite if enabled.
if ( is_multisite() ) {
    require( ABSPATH . WPINC . '/class-wp-site-query.php' );
    require( ABSPATH . WPINC . '/class-wp-network-query.php' );
    require( ABSPATH . WPINC . '/ms-blogs.php' );
    require( ABSPATH . WPINC . '/ms-settings.php' );
} elseif ( ! defined( 'MULTISITE' ) ) {
    define( 'MULTISITE', false );
}

register_shutdown_function( 'shutdown_action_hook' );

// Stop most of WordPress from being loaded if we just want the basics.
if ( SHORTINIT )
    return false;

// Load the L10n library.
require_once( ABSPATH . WPINC . '/l10n.php' );
require_once( ABSPATH . WPINC . '/class-wp-locale.php' );
require_once( ABSPATH . WPINC . '/class-wp-locale-switcher.php' );
// ...