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reset_node doesn't seem to work #234

Description

@mlowicki

Tested on fresh main

#[madsim::test]
async fn foo() {
    let handle = Handle::current();
    let addr0 = "10.0.0.1:50051".parse::<SocketAddr>().unwrap();
    let node0 = handle.create_node().name("server").ip(addr0.ip()).build();
    let id0 = node0.id();
    node0.spawn(async move {
        let listener = TcpListener::bind("10.0.0.1:50051").await.unwrap();

        loop {
            let (mut socket, _) = listener.accept().await.unwrap();

            let nb = socket.read_u8().await.unwrap();
            println!("got: {:?}", nb);
            let mut sum = 0_i64;

            for _ in 0..nb {
                let n = socket.read_u8().await.unwrap();
                sum += n as i64;
            }

            socket.write_i64(sum).await.unwrap();
            socket.flush().await.unwrap();
        }
    });

    let ip1 = "10.0.0.2".parse().unwrap();
    let node1 = handle.create_node().name("client").ip(ip1).build();
    let id1 = node1.id();

    let t1 = node1.spawn(async move {
        let mut stream = TcpStream::connect("10.0.0.1:50051").await.unwrap();
        NetSim::current().reset_node(id0);
        NetSim::current().reset_node(id1);
        //NetSim::current().clog_link(id, id2);
        //NetSim::current().clog_link(id2, id);
        //Handle::current().kill(id);
        stream.write_all(&[2,4,8]).await.unwrap();
        stream.flush().await.unwrap();
        let sum = stream.read_i64().await.unwrap();
        println!("SUM: {:?}", sum);
    });

    t1.await.unwrap();
}

With Handle::current().kill(id); commented out the test just hangs forever and I would expect that following reads from the socket to fail. If Handle::current().kill(id); is being used then I see Kind(UnexpectedEof).

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