func IntEnvDef(env string, def int) int {
	val := os.Getenv(env)
	if val == "" {
		return def
	}
	ival, err := strconv.Atoi(val)
	if err != nil {
		return def
	}
	return ival
}
func IntEnvDef(env string, def int) int {
	val := os.Getenv(env)
	if val == "" {
		return def
	}
	ival, err := strconv.Atoi(val)
	if err != nil {
		return def
	}
	return ival
}
func IntEnvDef ( env string , def int ) int { val := os . Getenv ( env ) if val == " " { return def } ival , err := strconv . Atoi ( val ) if err != nil { return def } return ival }
// IntEnvDef get environment variable, or some default def
IntEnvDef get environment variable or some default def