Zabbix

........S. [ZBX-20962] improved error message when trying to use foreach function with single item query

Merge in ZBX/zabbix from feature/ZBX-20962-6.0 to release/6.0

* commit 'f74e61c43239c9a37718e22f14cc6be055549976':
  ........S. [ZBX-20962] style fix
  .D........ [ZBX-20962] added changelog entry
  ........S. [ZBX-20962] improved error message when trying to use foreach function with single item query