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/GuzzleHttp/Exception/ConnectException.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace GuzzleHttp\Exception;
+
+use Psr\Http\Client\NetworkExceptionInterface;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Exception thrown when a connection cannot be established.
+ *
+ * Note that no response is present for a ConnectException
+ */
+class ConnectException extends TransferException implements NetworkExceptionInterface
+{
+    /**
+     * @var RequestInterface
+     */
+    private $request;
+
+    /**
+     * @var array
+     */
+    private $handlerContext;
+
+    public function __construct(
+        string $message,
+        RequestInterface $request,
+        ?\Throwable $previous = null,
+        array $handlerContext = []
+    ) {
+        parent::__construct($message, 0, $previous);
+        $this->request = $request;
+        $this->handlerContext = $handlerContext;
+    }
+
+    /**
+     * Get the request that caused the exception
+     */
+    public function getRequest(): RequestInterface
+    {
+        return $this->request;
+    }
+
+    /**
+     * Get contextual information about the error from the underlying handler.
+     *
+     * The contents of this array will vary depending on which handler you are
+     * using. It may also be just an empty array. Relying on this data will
+     * couple you to a specific handler, but can give more debug information
+     * when needed.
+     */
+    public function getHandlerContext(): array
+    {
+        return $this->handlerContext;
+    }
+}