feat(s2n-quic-dc): set linger to 0 (#2407)

Author: camshaft

dc/s2n-quic-dc/src/stream/client/tokio.rs

@@ -64,6 +64,7 @@ where
 
     // Make sure TCP_NODELAY is set
     let _ = socket.set_nodelay(true);
+    let _ = socket.set_linger(Some(core::time::Duration::ZERO));
 
     // if the acceptor_ip isn't known, then ask the socket to resolve it for us
     let peer_addr = if acceptor_addr.ip().is_unspecified() {

dc/s2n-quic-dc/src/stream/server/tokio/tcp.rs

@@ -502,6 +502,7 @@ where
     {
         // Make sure TCP_NODELAY is set
         let _ = stream.set_nodelay(true);
+        let _ = stream.set_linger(Some(Duration::ZERO));
 
         let meta = event::api::ConnectionMeta {
             id: 0, // TODO use an actual connection ID