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/26/post.inc

@@ -0,0 +1,10 @@
+<?php
+namespace MRBS;
+
+?>
+
+<script>
+//<![CDATA[
+  alert('If you have just upgraded to MRBS 1.4.6 or later and had previously configured MRBS with $unicode_encoding = 0, you MUST read and follow the instructions in UPGRADE to convert your database to UTF-8');
+//]];
+</script>