private static boolean nodeIsConsideredTooUnstable(final NodeInfo nodeInfo, final Params params) {
        return (params.maxPrematureCrashes != 0
                && nodeInfo.getPrematureCrashCount() > params.maxPrematureCrashes);
    }
Infer parameters from controller options. Important: does _not_ set cluster;
it must be explicitly set afterwards on the returned parameter object before
being used to compute states.
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/ClusterStateGenerator.java