server.go
func (ctx *RequestCtx) RemoteAddr() net.Addr {
	if ctx.c == nil {
		return zeroTCPAddr
	}
	addr := ctx.c.RemoteAddr()
	if addr == nil {
		return zeroTCPAddr
	}
	return addr
}
func (ctx *RequestCtx) RemoteAddr() net.Addr {
	if ctx.c == nil {
		return zeroTCPAddr
	}
	addr := ctx.c.RemoteAddr()
	if addr == nil {
		return zeroTCPAddr
	}
	return addr
}
// RemoteAddr returns client address for the given request.
//
// Always returns non-nil result.