@Override
    public String toString()
    {
        return "NettyOutboundConnectionHandler{" +
            "domainPair=" + domainPair +
            ", port=" + port +
            ", sslInitDone=" + sslInitDone +
            ", configuration=" + configuration +
            '}';
    }
Called when SSL Handshake has been completed.

If successful, attempts authentication via SASL, or dialback dependent on configuration and certificate validity.
If not successful, either attempts dialback on a plain un-encrypted connection, or throws an exception dependent
on configuration.

@param ctx ChannelHandlerContext for the Netty channel
@param evt Event that has been triggered - this implementation specifically identifies SslHandshakeCompletionEvent
@throws Exception
xmppserver/src/main/java/org/jivesoftware/openfire/nio/NettyOutboundConnectionHandler.java