HostClient.DoDeadline() error

[YzmjY]

Code:

	c := fasthttp.HostClient{
		Addr: "127.0.0.1:8080",
	}

	req := fasthttp.AcquireRequest()
	req.SetHost("127.0.0.1")
	req.Header.SetMethod("GET")
	rsp := fasthttp.AcquireResponse()
	dd := time.Now().Add(time.Second * 4)
	err := c.DoDeadline(req, rsp, dd)
	if err != nil {
		panic(err)
	}

I found that the timeout parameter doesn't work in this case, cause the config item RetryIf of HostClient will retry and ignore the timeout if the request is GET/HEAD/PUT method.I think it is not as expected , casue I set the timeout, then the DoDeadline should return before the deadline or return a timeout error.

[erikdubbelboer]

Good find, I just pushed a fix.