Zabbix

A......... [ZBX-26057] returned the presence of missing "message_format" field in the output of mediatype.get API method

* commit '69a5f4f06acec2fc35db5475f44ae534cb398ec3':
  .......... [ZBX-26057] modified changelog entry
  A......... [ZBX-26057] returned the previous flag's name of removing message_format
  A......... [ZBX-26057] fixed that the message_format field is not returned in the response to mediatype.get API call