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/Handler/FallbackGroupHandler.php

@@ -0,0 +1,71 @@
+<?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\Handler;
+
+use Throwable;
+
+/**
+ * Forwards records to at most one handler
+ *
+ * If a handler fails, the exception is suppressed and the record is forwarded to the next handler.
+ *
+ * As soon as one handler handles a record successfully, the handling stops there.
+ *
+ * @phpstan-import-type Record from \Monolog\Logger
+ */
+class FallbackGroupHandler extends GroupHandler
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function handle(array $record): bool
+    {
+        if ($this->processors) {
+            /** @var Record $record */
+            $record = $this->processRecord($record);
+        }
+        foreach ($this->handlers as $handler) {
+            try {
+                $handler->handle($record);
+                break;
+            } catch (Throwable $e) {
+                // What throwable?
+            }
+        }
+
+        return false === $this->bubble;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function handleBatch(array $records): void
+    {
+        if ($this->processors) {
+            $processed = [];
+            foreach ($records as $record) {
+                $processed[] = $this->processRecord($record);
+            }
+            /** @var Record[] $records */
+            $records = $processed;
+        }
+
+        foreach ($this->handlers as $handler) {
+            try {
+                $handler->handleBatch($records);
+                break;
+            } catch (Throwable $e) {
+                // What throwable?
+            }
+        }
+    }
+}