net,os: set the theoretical unlimited remaining bytes to max int64
Based on https://go-review.googlesource.com/c/go/+/466015/comment/073a63fa_7a9e485f
Change-Id: I3e1b035de6b8217c5fa5695e436f164b3058e33c
Reviewed-on: https://go-review.googlesource.com/c/go/+/471439
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Andy Pan <panjf2000@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>