in main.go [286:298]
func createServer(bind *url.URL, proxy *httputil.ReverseProxy, enableHttp2 bool) *http.Server {
var handler http.Handler
handler = proxy
if enableHttp2 {
http2server := &http2.Server{}
handler = h2c.NewHandler(proxy, http2server)
}
// Create server.
return &http.Server{
Addr: bind.Host,
Handler: handler,
}
}