func net/http/httputil.upgradeType

4 uses

	net/http/httputil (current package)
		reverseproxy.go#L255: 	reqUpType := upgradeType(outreq.Header)
		reverseproxy.go#L548: func upgradeType(h http.Header) string {
		reverseproxy.go#L556: 	reqUpType := upgradeType(req.Header)
		reverseproxy.go#L557: 	resUpType := upgradeType(res.Header)