go: *http.Client with Proxy.go

func initProxyHttpClient(proxyUrl string, insecure bool) *http.Client {
	pu, _ := url.Parse(proxyUrl)
	return &http.Client{
		Transport: &http.Transport{
			Proxy:        http.ProxyURL(pu),
			TLSNextProto: make(map[string]func(authority string, c *tls.Conn) http.RoundTripper),
			TLSClientConfig: &tls.Config{
				InsecureSkipVerify: insecure,
			},
		},
	}
}