internal/netreflect: more use of internal/nettest package

Change-Id: I4473e69bbb445ab27554f2dc625d0cbd79d7cfe5
Reviewed-on: https://go-review.googlesource.com/35072
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
1 file changed