Http 2

Check HTTP2 support

curl --http2 -vI https://http1.golang.org/ 2>&1 | grep ALPN
* ALPN, offering h2
* ALPN, offering http/1.1
* ALPN, server did not agree to a protocol

curl --http2 -vI https://http2.golang.org/ 2>&1 | grep ALPN
* ALPN, offering h2
* ALPN, offering http/1.1
* ALPN, server accepted to use h2

httpd.conf

Protocols h2 http/1.1