A way to specify returned HTTP code when calling TimeoutError

[Taik]

Currently, we need to call ctx.TimeoutError() if we wish to return from the request, which in turn sets the status code to StatusRequestTimeout.

Should there be another function:
func (*RequestCtx) TimeoutErrorWithCode(statusCode int, msg string)
which lets the user override the status code and message?

[valyala]

Done.

[valyala]

@Taik , fasthttp now has more generic TimeoutErrorWithResponse function. With this function you can set arbitrary status code, headers and body as 'timeout error' message.

[Taik]

Awesome--thanks for the quick turnaround @valyala!