Zabbix

........S. [ZBXNEXT-3877] Added "HistoryServiceTypes" parameter

Through the usage of a new parameter "HistoryServiceTypes", it's now possible to
decide which value types to send to the history service and by default all the values
for all the types will be sent if the history service is used.
The parameter is a comma-separated list of value types as defined in the API spec
and if a type of an history value is not present in the list, the value will be stored
in the zabbix database as usual.
The same parameter will be used for trends (unsigned numbers and float), in this
way we can be consistent on storing history values and the corresponsing trends
in the same place if the value type have them.

Discussed with Andris Zeila