Zabbix

........S. [ZBX-7887] added function to locate item in configuration cache by host, changed argument of evaluate_function from DB_ITEM to DC_ITEM

Added ability to locate item in configuration cache by host (DCconfig_get_items_by_keys_h),
changed argument of evaluate_function from DB_ITEM to DC_ITEM.
In zbx_evaluate_item_functions(), evaluate_macro_function() and calcitem_evaluate_expression() items are retrieved from cache now.