bind() for std::net::TcpStream

[tilpner]

std::net::TcpStream doesn't expose an API to bind to local IP addresses.

Python solves this with an optional source_address argument.

mio seems to expose this with a bind method, and I think the standard library shouldn't omit such functionality.

[alexcrichton]

Thanks for the report! This is currently covered by the std::net expansion RFC issue, though, so closing in favor of that.

[richardwhiuk]

For anyone in the future,, you can do this using the net2 crate - https://docs.rs/net2/0.2.32/net2/struct.TcpBuilder.html