ready to use upstream socket2?
https://gitlab.redox-os.org/redox-os/miow/blob/master/Cargo.toml#L17 doesn't seem necessary, since https://github.com/alexcrichton/socket2-rs/pull/25 was merged
https://gitlab.redox-os.org/redox-os/miow/blob/master/Cargo.toml#L17 doesn't seem necessary, since https://github.com/alexcrichton/socket2-rs/pull/25 was merged