byName map[string]uint64

	// byNameValue maps a HeaderField name/value pair to the unique id of the newest
	// entry with the same name and value. See above for a definition of "unique id".
	byNameValue map[pairNameValue]uint64
}

type pairNameValue struct {
	name, value string
}

func (t *headerFieldTable) init() {
	t.byName = make(map[string]uint64)
	t.byNameValue = make(map[pairNameValue]uint64)
}

		"transfer-encoding":           57,
		"user-agent":                  58,
		"vary":                        59,
		"via":                         60,
		"www-authenticate":            61,
	},
	byNameValue: map[pairNameValue]uint64{
		{name: ":authority", value: ""}:                   1,
		{name: ":method", value: "GET"}:                   2,
		{name: ":method", value: "POST"}:                  3,