Support reloading responses from disk

go/fake-http/fake-http.go

		}
	}
	var responsesPath string
	if flag.NArg() == 1 {
		rs, err := loadResponses(flag.Arg(0))
		if err != nil {
			log.Fatalf("Error: Parsing %s: %s", flag.Arg(0), err)
		}
		responses = rs
		responsesPath = flag.Arg(0)
	}
	requestLog := make([]LogEntry, 0)
	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		responses = loadResponses(flag.Arg(0), false, responses)
		var resp *http.Response
		if flags.proxyURL != "" {
			resp = respondWithProxy(flags.proxyURL, w, req)
	})
	http.HandleFunc("/_stubs", func(w http.ResponseWriter, req *http.Request) {
		responses = loadResponses(responsesPath, false, responses)
		var err error
		if strings.Contains(req.Header.Get("Accept"), "application/yaml") {
			err = renderYAML(w, responses)
	return r
}
func loadResponses(path string) ([]Response, error) {
func loadResponses(path string, abort bool, prevResponses []Response) []Response {
	rs, err := loadResponsesRaw(path)
	if err != nil {
		if abort {
			log.Fatalf("Error: Parsing %s: %s", flag.Arg(0), err)
		}
		return prevResponses
	}
	return rs
}
func loadResponsesRaw(path string) ([]Response, error) {
	out, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err