[PHP 8.1] Add MYSQLI_REFRESH_REPLICA polyfill

Author: IonBazan

Diff for: README.md

@@ -1,9 +1,10 @@
-Symfony Polyfill / Php80
+Symfony Polyfill / Php81
 ========================
 
 This component provides features added to PHP 8.1 core:
 
 - [`array_is_list`](https://php.net/array_is_list)
+- [`MYSQLI_REFRESH_REPLICA`](https://www.php.net/manual/en/mysqli.constants.php#constantmysqli-refresh-replica) constant
 
 More information can be found in the
 [main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).

Diff for: bootstrap.php

@@ -15,6 +15,10 @@
     return;
 }
 
+if (defined('MYSQLI_REFRESH_SLAVE') && !defined('MYSQLI_REFRESH_REPLICA')) {
+    define('MYSQLI_REFRESH_REPLICA', MYSQLI_REFRESH_SLAVE);
+}
+
 if (!function_exists('array_is_list')) {
     function array_is_list(array $array): bool { return p\Php81::array_is_list($array); }
 }