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/40/pgsql.sql

@@ -0,0 +1,30 @@
+-- Add some foreign keys
+
+-- First of all tidy up the database getting rid of any zombie rows which would prevent
+-- the foreign keys being created.   Note that these rows will not be visible to users 
+-- and admins through MRBS.   They have most likely been created when a row has been
+-- deleted from a table using a database admin tool, rather than through MRBS.  Of course,
+-- foreign keys will stop this happening in the future.
+
+DELETE FROM %DB_TBL_PREFIX%room WHERE area_id NOT IN (SELECT id FROM %DB_TBL_PREFIX%area);
+DELETE FROM %DB_TBL_PREFIX%repeat WHERE room_id NOT IN (SELECT id FROM %DB_TBL_PREFIX%room);
+DELETE FROM %DB_TBL_PREFIX%entry WHERE room_id NOT IN (SELECT id FROM %DB_TBL_PREFIX%room);
+
+
+ALTER TABLE %DB_TBL_PREFIX%room
+  ADD FOREIGN KEY (area_id) 
+    REFERENCES %DB_TBL_PREFIX%area(id)
+    ON UPDATE CASCADE
+    ON DELETE RESTRICT;
+
+ALTER TABLE %DB_TBL_PREFIX%repeat
+  ADD FOREIGN KEY (room_id) 
+    REFERENCES %DB_TBL_PREFIX%room(id)
+    ON UPDATE CASCADE
+    ON DELETE RESTRICT;
+    
+ALTER TABLE %DB_TBL_PREFIX%entry
+  ADD FOREIGN KEY (room_id) 
+    REFERENCES %DB_TBL_PREFIX%room(id)
+    ON UPDATE CASCADE
+    ON DELETE RESTRICT;