(WARNING: This story may contain references to violence which some readers may find distressing or disturbing. Read with discretion. )MANILA, Philippines — If you drink, don't drive or, if you're a policeman, don't carry a service firearm as one or two may end up dead.This was exactly what happened in Maragondon, Cavite past midnight on Wednesday when two drunk police officers engaged in a shootout during the birthday party of the town's chief o…