title: Zabbix cyrillic charsets wrong
body: <p>I have troubles with charsets in zabbix.
  I use zabbix 3.4v and i tried change DB charsets to UTF8, cp1251, latin1, nothing didn't help me.
  My zabbix agent send to server values with Cyrillic characters, but zabbix server receive all of them with question symbols. What i should to do?
  How to fix problem?</p>