By Toby Sterling AMSTERDAM (Reuters) -The Dutch antitrust watchdog fined Apple 5 million euros ($5.7 million) again on Monday, its fourth such fine for failing to allow software application makers in the Netherlands to use non-Apple payment methods for dating apps on the App Store. The Authority for Consumers and Markets (ACM) has been levying weekly fines of 5 million euros on Apple since the company missed a Jan. 15 deadline to make changes ordered by the watchdog. Apple’s app-store payment policies, in particular its requirement that app developers exclusively use Apple’s payment system wit…