How to setup HTTP/2 Cleartext support

[treeder]

For anyone wondering how to do this:

h2s := &http2.Server{}
srv := &http.Server{
    Addr:    fmt.Sprintf("0.0.0.0:%v", port),
    Handler: h2c.NewHandler(r, h2s), // HTTP/2 Cleartext handler
}
err := srv.ListenAndServe()

Test with:

curl -i --http2-prior-knowledge http://localhost:8080

[kmai]

Really useful, thanks!