Zabbix

A.F.....S. [ZBXNEXT-1911] added support of varargs to concat()

* commit '3efeade27b181906aa39d718db51ee83ff613bc0':
  .......... [ZBXNEXT-1911] added scenario for concat function with multiple parameters
  ..F....... [ZBXNEXT-1911] do not show trends field for textual value types of Calculated item
  .......... [ZBXNEXT-1911] fixed autotests part 1
  ..F....... [ZBXNEXT-1911] allowed more than two parameters for concat()
  A.F....... [ZBXNEXT-1911,ZBXNEXT-7399] allowed textual types of information for Calculated items; updated UI with toggling of trend mode; resolved conflict
  ........S. [ZBXNEXT-1911] added support of varargs to concat()