private void openStream() {
        session.incrementClientPacketCount();
        connection.deliverRawText(withoutDeclaration(getStreamHeader()));
    }
A {@link org.jivesoftware.openfire.net.StanzaHandler} that is able to process the specific framing that is used by
clients connecting via websockets.

@author Guus der Kinderen, guus@goodbytes.nl
@see <a href="https://www.rfc-editor.org/rfc/rfc7395.html">RFC 7395:  An Extensible Messaging and Presence Protocol (XMPP) Subprotocol for WebSocket</a>
xmppserver/src/main/java/org/jivesoftware/openfire/websocket/WebSocketClientStanzaHandler.java