Fix #4472 a better way
Unlike switch, select will randomly choose from among multiple cases if more than one are satisfiable.
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@ -166,10 +166,7 @@ func (r *Renewer) Renew() {
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result = r.renewLease()
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}
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select {
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case r.doneCh <- result:
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case <-r.stopCh:
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}
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r.doneCh <- result
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}
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// renewAuth is a helper for renewing authentication.
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