Make loglevel configurable

cmd/cacertocsp/main.go

@@ -71,7 +71,12 @@ func main() {
 		logrus.Panicf("could not load configuration: %v", err)
 	}
 
-	logrus.SetLevel(logrus.DebugLevel)
+	logrus.SetLevel(logrus.InfoLevel)
+
+	level, err := logrus.ParseLevel(config.String("loglevel"))
+	if err == nil {
+		logrus.SetLevel(level)
+	}
 
 	issuerConfigs := config.Slices(coIssuers)