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。

upgrade/49/mysql.sql

@@ -0,0 +1,8 @@
+-- Add a sort_key for the area table and populate it with the area_name.
+-- Just in case the area_name column has been extended, truncate the area_name when copying it into the sort_key
+
+ALTER TABLE %DB_TBL_PREFIX%area
+  ADD COLUMN `sort_key` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT '' NOT NULL AFTER `area_name`;
+  
+UPDATE %DB_TBL_PREFIX%area
+  SET `sort_key`=SUBSTR(`area_name`, 1, 30);

upgrade/49/pgsql.sql

@@ -0,0 +1,8 @@
+-- Add a sort_key for the area table and populate it with the area_name.
+-- Just in case the area_name column has been extended, truncate the area_name when copying it into the sort_key
+
+ALTER TABLE %DB_TBL_PREFIX%area
+  ADD COLUMN sort_key varchar(30) DEFAULT '' NOT NULL;
+  
+UPDATE %DB_TBL_PREFIX%area
+  SET sort_key=SUBSTR(area_name, 1, 30);