Be more strict, when parsing json

sinks/httpSink.go

@@ -272,8 +272,10 @@ func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
 
 	// Read config
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}