opreports_availability_strict (default: true)
- if missing or 1'true', then the normal behaviour for nodata-or-normal is used (ie. if reachability isn't present, it counts as nodata).
- no data = 'down' when opreports_availability_strict=true
- If set to 0'false', then records with missing reachability but existing response time are fudged up so that the reachability = 100 (and loss = 0 if that's also missing) and therefore such a record does NOT count as nodata.
- no data = 'up' when opreports_availability_strict=false
In both cases, if reachability is missing but response time is present, a debug3 about the inconsistency is logged. This applies to both availability report data and availability report graphs.