Throwing around money to demonstrate its commitment to the movie business, Netflix has rented Brad Pitt. That's the main headline to take from "War Machine," a muddled satire about the war in Afghanistan awkwardly forced to camouflage its lead character behind a pseudonym. "War Machine" might yearn to be "Wag the Dog" in terms of focusing a jaundiced eye on 21st-century U.S. military adventures abroad. But it's really just a Hollywood example of that movie's principle -- with marquee value, in this case, acting as the tail in this Pitt-powered vehicle.