[release-branch.go1.10] net: don't let cancelation of a DNS lookup affect another lookup
Updates #8602
Updates #20703
Fixes #22724
Change-Id: I27b72311b2c66148c59977361bd3f5101e47b51d
Reviewed-on: https://go-review.googlesource.com/100840
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-on: https://go-review.googlesource.com/102787
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>