// ignored.
	GetProxyConnectHeader func(ctx context.Context, proxyURL *url.URL, target string) (Header, error)

	// MaxResponseHeaderBytes specifies a limit on how many
	// response bytes are allowed in the server's response
	// header.
	//
	// Zero means to use a default limit.
	MaxResponseHeaderBytes int64

	// WriteBufferSize specifies the size of the write buffer used
	// when writing to the transport.

pkg net/http, type Transport struct, IdleConnTimeout time.Duration
pkg net/http, type Transport struct, MaxIdleConns int
pkg net/http, type Transport struct, MaxResponseHeaderBytes int64
pkg net/http, var ErrUseLastResponse error
pkg net/http, var LocalAddrContextKey *contextKey
pkg net/http, var ServerContextKey *contextKey
pkg net/http/cgi, type Handler struct, Stderr io.Writer

	if mode == http2Mode {
		t.Skip("HTTP/2 Transport doesn't support MaxResponseHeaderBytes")
	}
	ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		if r.URL.Path == "/long" {
			w.Header().Set("Long", strings.Repeat("a", 1<<20))
		}
	})).ts
	c := ts.Client()
	c.Transport.(*Transport).MaxResponseHeaderBytes = 512 << 10

	if res, err := c.Get(ts.URL); err != nil {

		{"Transport.IdleConnTimeout", Field, 7},
		{"Transport.MaxConnsPerHost", Field, 11},
		{"Transport.MaxIdleConns", Field, 7},
		{"Transport.MaxIdleConnsPerHost", Field, 0},
		{"Transport.MaxResponseHeaderBytes", Field, 7},
		{"Transport.OnProxyConnectResponse", Field, 20},
		{"Transport.Proxy", Field, 0},
		{"Transport.ProxyConnectHeader", Field, 8},
		{"Transport.ReadBufferSize", Field, 13},