local_address and peer_address can panic

[howardjohn]

I don't think we can currently trigger this, but if the connection is fully shutdown this will error and panic. We unwrap it everywhere.

We could maybe use abstraction like

ztunnel/src/socket.rs

Line 148 in 6f42530

pub struct Listener(TcpListener);

to fetch it once.

Note this only happens if the entire connection is gone, so as long as we don't call shutdown() and THEN *_address() it is all fine. This is more defense in depth