in proxy/lib/proxy/proxy.go [422:432]
func proxyDirector(proxy *httputil.ReverseProxy) {
defaultDirector := proxy.Director
proxy.Director = func(r *http.Request) {
host := r.Host
if defaultDirector != nil {
defaultDirector(r)
}
fixHostInProxyDirector(r, host)
requestHeaderFilter(r)
}
}