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/48/mysql.sql

@@ -0,0 +1 @@
+#

web/upgrade/48/post.inc

@@ -0,0 +1,16 @@
+<?php
+namespace MRBS;
+
+$message = "If you have just upgraded to MRBS 1.5.1 or later please " .
+           "note that the config setting '" . '$db_nopersist' . "' has been replaced " .
+           "by '" . '$db_persist' . "'.  The default setting for MRBS is now *not* to " .
+           "use persistent connections.";
+?>
+
+<script>
+//<![CDATA[
+  alert("<?php echo $message?>");
+//]];
+</script>
+
+<?php