fix: add sndbuf/rcvbuf to Socket accept initializer

The accept() method was missing sndbuf and rcvbuf fields that were
added to the Socket struct. Inherit values from the listening socket.

ipcd/src/uds/stream.rs

@@ -265,6 +265,8 @@ impl Socket {
             connection: Some(Connection::new(awaiting_client_id)),
             issued_token: None,
             ucred: client_ucred,
+            sndbuf: self.sndbuf,
+            rcvbuf: self.rcvbuf,
         })
     }