Zabbix

A.F....... [ZBXNEXT-6470,ZBXNEXT-6716] implemented API method history.clear

* commit '29967947aa512244c9dc72f780df11f6bb694243':
  .......... [ZBXNEXT-6470,ZBXNEXT-6716] changed changelog entity
  A......... [ZBXNEXT-6470,ZBXNEXT-6716] moved new method to the History class
  ..F....... [ZBXNEXT-6470,ZBXNEXT-6716] fixed selecing of the "History clear" action for "Item" resource
  A......... [ZBXNEXT-6470,ZBXNEXT-6716] fixed "Clear history" audit loging from "Item" form
  A......... [ZBXNEXT-6470,ZBXNEXT-6716] fixed coding style issues
  A......... [ZBXNEXT-6470,ZBXNEXT-6716] fixed handling of the itemprototype.clear method call
  A.F....... [ZBXNEXT-6470,ZBXNEXT-6716] implemented API method item.clear for history cleanup for items and web scenarios history