Test disabling http2

README.md

Based on golang/go#13598, I should be able to disable the http2 client with:

GODEBUG=h2client=0 go run get.go

get.go

package main

import (
        "io/ioutil"
        "log"
        "net/http"
)

func main() {
        res, err := http.Get("https://buildkite.com/")
        if err != nil {
                log.Fatal(err)
        }
        log.Printf("Res: %#v", res)
        b, err := ioutil.ReadAll(res.Body)
        if err != nil {
                log.Fatal(err)
        }
        log.Printf("Read %d bytes", len(b))
}