Zabbix

A......... [ZBX-16349] fixed "Delete missing" checkbox does not work when importing template without checking "Update existing"

* commit 'c49c7f62a6eeca5577a675b0476d7333b34511f2':
  .D........ [ZBX-16349] added ChangeLog entry
  A......... [ZBX-16349] moved deleting of missing prototypes from deleteMissingDiscoveryRules() to new method deleteMissingPrototypes()
  A......... [ZBX-16349] fixed discovery rules and its descendants import logic
  A......... [ZBX-16349] reverted changes made in 5acda49 which cause undefined offset error when updating a discovery rule with an item prototype that is using a host interface; reverted changes regarding unresolved template references
  A......... [ZBX-16349] fixed "Delete missing" checkbox does not work when importing template without checking "Update exising"