Fix deadlock when failing to bind/listen on port

[nikitalita]

Socket deadlocks when failing to bind to a port, due to reset() (which calls the Shared destructor, which calls its lock) being called while we hold the lock (it would have segfaulted anyway even if this wasn't the case, since the destructor would have been called while we were in the middle of a member call stack). Calling reset() while outside of the lock fixes this.