Function copyHeader

modules/caddyhttp/reverseproxy/reverseproxy.go:1534–1540

(dst, src http.Header)

}

func copyHeader(dst, src http.Header) {
	for k, vv := range src {
		for _, v := range vv {
			dst.Add(k, v)
		}
	}
}

// allHeaderValues gets all values for a given header field,
// joined by a comma and space if more than one is set. If the