code: func (b *URLBackoff) Disable() {
  	glog.V(4).Infof("Disabling backoff strategy")
  	b.Backoff = util.NewBackOff(0*time.Second, 0*time.Second)
  }
docs: // Disable makes the backoff trivial, i.e., sets it to zero.  This might be used
  // by tests which want to run 1000s of mock requests without slowing down.