Minor features
- App::getNativeHandle and AsyncSocket::getNativeHandle will return the SSL_CTX and SSL pointers, respectively. In the case of non-SSL, the file descriptor or nullptr will be returned.
- maxBackpressure is now applied to WebSocket::send, not only WebSocket::publish. This means any attempt at sending when having too much backpressure will be ignored, skipped, and return success. If you don't want this behavior either disable maxBackpressure or check getBufferedAmount before sending, manually.