For those interested, the unstable (alpha) HTTP&#x2F;2 element of NGINX is this patch for the 1.9.x mainline versions: <a href="http:&#x2F;&#x2F;nginx.org&#x2F;patches&#x2F;http2&#x2F;README.txt" rel="nofollow">http:&#x2F;&#x2F;nginx.org&#x2F;patches&#x2F;http2&#x2F;README.txt</a>