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。

tzurl/zoneinfo/America/Cancun.ics

@@ -0,0 +1,91 @@
+BEGIN:VCALENDAR
+PRODID:-//tzurl.org//NONSGML Olson 2025c//EN
+VERSION:2.0
+BEGIN:VTIMEZONE
+TZID:America/Cancun
+LAST-MODIFIED:20251211T094730Z
+TZURL:https://www.tzurl.org/zoneinfo/America/Cancun
+X-LIC-LOCATION:America/Cancun
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-054704
+TZOFFSETTO:-0600
+DTSTART:19220101T001256
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19811226T020000
+RDATE:20150201T020000
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19830104T000000
+RDATE:19961027T020000
+RDATE:20010930T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19960407T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU;UNTIL=19970406T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:EST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0500
+DTSTART:19971026T020000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:EDT
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+DTSTART:19980405T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0400
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+DTSTART:19980802T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:19981025T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=20001029T070000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:19990404T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU;UNTIL=20000402T080000Z
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
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+DTSTART:20010506T020000
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CDT
+TZOFFSETFROM:-0600
+TZOFFSETTO:-0500
+DTSTART:20020407T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU;UNTIL=20140406T080000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CST
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0600
+DTSTART:20021027T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=20141026T070000Z
+END:STANDARD
+END:VTIMEZONE
+END:VCALENDAR