MRBS 1.12.2 等保2.0二级整改完整提交

包含：登录失败锁定、90天密码有效期、30分钟会话超时、
强制改密、登录审计日志、屏幕水印、企业背景图、
备案信息固定底部、favicon、JS空集合保护、
会话过期体验优化（403 JSON）、display_errors 关闭、
固定 key 根治 Integrity check failed 等全部改动

注意：config.inc.php/.htaccess/.user.ini 含敏感信息，
通过 .gitignore 排除，勿推送到公开仓库。

lib/MRBS/Intl/IntlDatePatternGenerator.php

@@ -0,0 +1,58 @@
+<?php
+declare(strict_types=1);
+namespace MRBS\Intl;
+
+// A class which is just a wrapper for the standard PHP class if it's available; otherwise it
+// provides a basic emulation of PHP's IntlDatePatternGenerator class.
+
+use MRBS\Exception;
+use MRBS\Language;
+
+// We need to check that the 'intl' extension is loaded because earlier versions of
+// MRBS had the IntlDatePatternGenerator emulation class at the top level in lib.  If users
+// have upgraded by just overwriting files without deleting that file, then it will
+// be picked up by the class_exists() test and used instead of the more up-to-date
+// emulation below.
+if (class_exists('\IntlDatePatternGenerator') && extension_loaded('intl'))
+{
+  class IntlDatePatternGenerator extends \IntlDatePatternGenerator
+  {
+  }
+}
+else
+{
+  class IntlDatePatternGenerator
+  {
+    private const DEFAULT_LOCALE = 'en';
+
+    private $locale;
+
+    // $locale  The locale. If null is passed, uses the ini setting intl.default_locale.
+    public function __construct(?string $locale = null)
+    {
+      if (!isset($locale)) {
+        $locale = ini_get('intl.default_locale');
+        if (($locale === false) || ($locale === '')) {
+          throw new Exception("Could not get locale");
+        }
+      }
+
+      $this->locale = $locale;
+    }
+
+
+    public function getBestPattern(string $skeleton)
+    {
+      $file = MRBS_ROOT . "/intl/skeletons/$skeleton.ini";
+
+      if (is_readable($file)) {
+        $patterns = parse_ini_file($file);
+        if (!empty($patterns)) {
+          return $patterns[Language::convertToBcp47($this->locale)] ?? $patterns[self::DEFAULT_LOCALE] ?? false;
+        }
+      }
+
+      return false;
+    }
+  }
+}