Function packetize

modules/crypt/ssl/ssl_handshake.js:190–200

(session, msgType, body)

			handshakeDigestUpdate(session, body);
	},
	packetize(session, msgType, body) {
		session.traceProtocol(this);
		body = body.getChunk();
		let s = new SSLStream(undefined, 1 + 3 + body.byteLength);
		s.writeChar(msgType);
		s.writeChars(body.byteLength, 3);
		s.writeChunk(body);
		let msg = s.getChunk();
		handshakeDigestUpdate(session, msg);
		return recordProtocol.packetize(session, recordProtocol.handshake, msg);
	},

	// protocols
	helloRequest: {