Zabbix

.......PS. [DEV-4919] added DenyItemTypes configuration parameter

* commit 'e7960f563d6c0105f1b83655614e455f99c81dc8':
  .......PS. [DEV-4919] updated descriptions
  .......PS. [DEV-4919] minor refactoring
  .......PS. [DEV-4919] refactored zbx_str_list_next() to produce a final empty token by trailing delimiter
  .......PS. [DEV-4919] handled last delimiter for zbx_validate_export_type()
  .......PS. [DEV-4919] refactoring of zbx_parse_item_types()
  .......PS. [DEV-4919] skipped denied items for proxy and active agent configuration
  .......PS. [DEV-4919] discarded stale values pushed from a previously loaded configuration like active agent, sender, or proxy-forwarded history
  .......PS. [DEV-4919] minor refactoring of log message
  .......PS. [DEV-4919] blocked execution of denied item through an agent
  .......PS. [DEV-4919] fixed item test execution
  .......PS. [DEV-4919] renamed item types
  .......PS. [DEV-4919] fixed item unblocking in DCsync_items()
  .......PS. [DEV-4919] added DenyItemTypes configuration parameter