Suggestion: let a script do the trigger arithmetics

[steveboyson]

I wish Zabbix would support the possibility to do the trigger stuff with an external script.

It would accept at least
- {HOST.NAME}
- {TRIGGER.NAME}
- {ITEM.LASTVALUE}
- {EVENT.DATE} - {EVENT.TIME}

then it is doing some checks and finally returns 0 or 1 depending if the trigger should fire or not.

Any comments on that?