Zabbix

..F.....S. [ZBXNEXT-8074] fixed csrf token validation

Merge in ZBX/zabbix from feature/ZBXNEXT-8074-6.3-1 to master

* commit '2755d957cfe7d5ee8fac2ec1fe82662cbfdb268a':
  ..F....... [ZBXNEXT-8074] fixed validation of CSRF token in the CController class
  ..F....... [ZBXNEXT-8074] do not include js file for non authenticated user; trigger undefined index when csrf token helper get is called for non authenticated user
  ..F....... [ZBXNEXT-8074] removed exception, token validity should not be checked in helper
  ..F....... [ZBXNEXT-8074] minor perfomrance improvement
  ..F....... [ZBXNEXT-8074] fixed undefined index
  ..F....... [ZBXNEXT-8074] fixed csrf token validation in legacy controllers
  ..F....... [ZBXNEXT-8074] fixed csrf token validation in mvc controllers
  ..F....... [ZBXNEXT-8074] fixed csrf token validation in mvc controllers