Zabbix

.......... [ZBXNEXT-8486] updated to latest master, partial update; resolved conflicts in:
- src/libs/zbxdbupgrade/dbupgrade_6050.c
- ui/include/classes/mvc/CLegacyAction.php
- ui/include/classes/routing/CUrlFactory.php
- ui/include/defines.inc.php
- ui/include/forms.inc.php