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、登录页JS修复等全部改动

web/upgrade/34/mysql.sql

@@ -0,0 +1,13 @@
+# Add a month_relative column so that monthly sameday repeats can be converted to the
+# new format.   The conversion itself is done in post.inc
+
+# 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.
+# The restoration is done in the next upgrade because we need to operate on the table
+# first using post.inc
+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 month_relative varchar(4) DEFAULT NULL;