Docs: Document some globals in wp-admin/setup-config.php.

Follow-up to [29669], [29705], [32642], [45737], [47230], [51477].

Props upadalavipul, sabernhardt.
See #60021.

git-svn-id: https://develop.svn.wordpress.org/trunk@57756 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/setup-config.php

@@ -116,6 +116,10 @@ function setup_config_display_header( $body_classes = array() ) {
 	<?php
 } // End function setup_config_display_header();
 
+/**
+ * @global string    $wp_local_package Locale code of the package.
+ * @global WP_Locale $wp_locale        WordPress date and time locale object.
+ */
 $language = '';
 if ( ! empty( $_REQUEST['language'] ) ) {
 	$language = preg_replace( '/[^a-zA-Z0-9_]/', '', $_REQUEST['language'] );