Function backoff

dialer.go:437–443

(attempt int, min time.Duration, max time.Duration)

}

func backoff(attempt int, min time.Duration, max time.Duration) time.Duration {
	d := time.Duration(attempt*attempt) * min
	if d > max {
		d = max
	}
	return d
}

func canonicalAddress(s string) string {
	return net.JoinHostPort(splitHostPort(s))