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/Monolog/Processor/HostnameProcessor.php

@@ -0,0 +1,36 @@
+<?php declare(strict_types=1);
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog\Processor;
+
+/**
+ * Injects value of gethostname in all records
+ */
+class HostnameProcessor implements ProcessorInterface
+{
+    /** @var string */
+    private static $host;
+
+    public function __construct()
+    {
+        self::$host = (string) gethostname();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function __invoke(array $record): array
+    {
+        $record['extra']['hostname'] = self::$host;
+
+        return $record;
+    }
+}