Illogical airline rules mean it can sometimes be cheaper to buy a ticket for, say, New York-London-Frankfurt than New York-London, and simply not fly the second leg of the journey. Now an airline is trying to stop a website which shows travellers how to do it. Who’s right and who’s wrong? New Yorker Aktarer Zaman is only 22 years old  but in the US he has become a minor business celebrity. Zaman’s claim to fame is that United Airlines and the online travel agency Orbitz s...