newly stabilized std::net::lookup_host not very ergonomic to use

[nwin]

The new lookup_host method now returns SocketAddrs instead of an IpAddrs. Unfortunately the returned SocketAddr is not very useful because it defaults to port 0. Since SocketAddr does not have any setters for the port I basically have to re-create every single returned value to make use of it.

lookup_host should either take a port as an argument or only return IP addresses. I would prefer the latter.

[alexcrichton]

I agree that stabilizing it may have been a little hasty. I've proposed destabilizing it as part of #23711

[steveklabnik]

Since it was destabilized, I'm going to give this a close.