Updates golang/go#17422 Change-Id: Ie5f16e24f87b3d800f1182b5b09d6cf638135e33 Reviewed-on: https://go-review.googlesource.com/30970 TryBot-Result: Gobot Gobot <gobot@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Adam Langley <agl@golang.org>