Saudi Arabia has started to increase its oil output as part of a contingency plan in the event the United States attacks Iran and oil flows are disrupted, Reuters reported on Wednesday, as OPEC’s biggest oil producer positions itself as a "reliable supplier" looking to take up its traditional role as a key swing producer ready to stabilize the markets if a conflict occurs. U.S. President Donald Trump recently revealed that he is considering a "limited military strike" on Iran in a bid to pressure its leaders into a new nuclear agreement.…