Zabbix

.......PS. [DEV-4919] blocked execution of calculated item when StartHistoryPollers is 0

* commit 'f90be3e950e278d9d6b88ad64b13eae441a36ad1':
  .......PS. [DEV-4919] refactored function style
  .......PS. [DEV-4919] fixed error message
  .......PS. [DEV-4919] reworked active item types fix
  .......PS. [DEV-4919] fixed active item types
  .......PS. [DEV-4919] added libcurl check to process_zero_pollers_items()
  .......PS. [DEV-4919] reworked execution block of any item if its Start*Pollers is set to 0
  .......PS. [DEV-4919] blocked execution of any item if its Start*Pollers is set to 0
  .......PS. [DEV-4919] blocked execution of calculated item when StartHistoryPollers is 0