config/config.go
func Must(s string) *Config {
	c, err := Parse(s)
	if err != nil {
		log.Fatal(err)
	}
	return c
}
func Must(s string) *Config {
	c, err := Parse(s)
	if err != nil {
		log.Fatal(err)
	}
	return c
}
// Must returns a config object that must compile. If there are any errors, this
// function will panic. This is most useful in testing or constants.