Bootstrap/Load: Require wp-includes/compat.php in wp-load.php.

This allows for using polyfill functions if the site is not installed yet.

Follow-up to [28978], [55988].

Props joedolson, dd32.
See #58206.

git-svn-id: https://develop.svn.wordpress.org/trunk@56006 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-load.php

@@ -64,6 +64,7 @@ if ( file_exists( ABSPATH . 'wp-config.php' ) ) {
 	// Standardize $_SERVER variables across setups.
 	wp_fix_server_vars();
 
+	require_once ABSPATH . WPINC . '/compat.php';
 	require_once ABSPATH . WPINC . '/functions.php';
 
 	$path = wp_guess_url() . '/wp-admin/setup-config.php';