Zabbix

...G...... [ZBX-19912] fixed mysql.db.size and pgsql.custom.query items for Zabbix agent 2

* commit '46ed55b95d53d018c25693f9e10ab5350ea0e368':
  ...G...... [ZBX-19912] added change log entry
  ...G...... [ZBX-19912] code clean up
  ...G...... [ZBX-19912] fixed mysql.db.size and pgsql.custom.query items for Zabbix agent 2