fhttp/client.go
func NewClientHandler(bodyHandler fasthttp.RequestHandler, life time.Duration, remote string) *ClientHandler {
	return &ClientHandler{
		bodyHandler:      bodyHandler,
		rule:             DefaultRuleSet,
		life:             life,
		remoteHandlerURL: remote,
	}
}
func NewClientHandler(bodyHandler fasthttp.RequestHandler, life time.Duration, remote string) *ClientHandler {
	return &ClientHandler{
		bodyHandler:      bodyHandler,
		rule:             DefaultRuleSet,
		life:             life,
		remoteHandlerURL: remote,
	}
}
// NewClientHandler returns a new remote client handler
// which asks the remote handler the cached entry's response
// with a GET request, or add a response with POST request
// these all are done automatically, users can use this
// handler as they use the local.go/NewHandler
//
// the ClientHandler is useful when user
// wants to apply horizontal scaling to the app and
// has a central http server which handles