Zabbix

........S. [ZBXNEXT-3877] Added 'Time-To-Live' handling for history values

The DC_ITEM and ZBX_DC_ITEM received a new history_sec parameter. The fields
will be treated as canonical configuration fields during the item comparison and
synchronization with the database.
In particular, the field will be populated at synchronization time with the current
history value for the item, or with the global history value if the housekeeper is
set for overriding it. After the value is set, during the DCmass_add_history()
execution, every history value to be sent to the history service, will receive it's
ttl through the corresponding DC_ITEM stored in the configuration cache.