- improve correctness of closing connections on failure ([libp2p/go-libp2p-transport-upgrader#19](https://github.com/libp2p/go-libp2p-transport-upgrader/pull/19))
- improve correctness of closing connections on failure ([libp2p/go-libp2p-transport-upgrader#19](https://github.com/libp2p/go-libp2p-transport-upgrader/pull/19))