if err != nil {
		return err
	}
	return nil
}

// validDNSName is a rather rudimentary check for the validity of a DNS name.
// This is used to check if the public_name in a ECHConfig is valid when we are
// picking a config. This can be somewhat lax because even if we pick a
// valid-looking name, the DNS layer will later reject it anyway.
func validDNSName(name string) bool {
	if len(name) > 253 {
		return false
	}