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/62/mysql.sql

@@ -0,0 +1,29 @@
+# Replace rep_num_weeks and rep_num_months by interval
+
+# We save the current value of the timestamp before updating and restore it 
+# afterwards because we do not want the timestamp to be changed by this operation
+
+ALTER TABLE %DB_TBL_PREFIX%repeat
+  ADD COLUMN saved_ts DATETIME;
+  
+UPDATE %DB_TBL_PREFIX%repeat
+  SET saved_ts=timestamp;
+
+ALTER TABLE %DB_TBL_PREFIX%repeat
+  ADD COLUMN rep_interval smallint DEFAULT 1 NOT NULL AFTER rep_num_months;
+  
+UPDATE %DB_TBL_PREFIX%repeat
+  SET rep_interval=rep_num_weeks WHERE rep_type=2 AND rep_num_weeks IS NOT NULL;
+  
+UPDATE %DB_TBL_PREFIX%repeat
+  SET rep_interval=rep_num_months WHERE rep_type=3 AND rep_num_months IS NOT NULL;
+  
+ALTER TABLE %DB_TBL_PREFIX%repeat
+  DROP COLUMN rep_num_weeks,
+  DROP COLUMN rep_num_months;
+
+UPDATE %DB_TBL_PREFIX%repeat
+  SET timestamp=saved_ts;
+  
+ALTER TABLE %DB_TBL_PREFIX%repeat
+  DROP COLUMN saved_ts;