Zabbix

A......... [ZBX-21538] fixed history.get API method blocking drop_chunks requests during housekeeping

* commit '39b846b8be0e6af8ff95d73c14a7069308128f65':
  .......... [ZBX-21538] fixed Selenium tests
  .D........ [ZBX-21538] updated authors
  A......... [ZBX-21538] fixed history manager call to respect history and trends data storage periods
  A......... [ZBX-21538] reverted previous commit
  A......... [ZBX-21538] removed limiting the data search to a lower time bound when "Data storage period" is zero
  A......... [ZBX-21538] removed artificial restrictions for time_from and time_till parameters
  .D........ [ZBX-21538] added changelog file
  A......... [ZBX-21538] fixed history.get API method blocking drop_chunks requests during housekeeping