A $10 priority-boarding fee here, a $25 checked-bag fee there; pretty soon, you’re talking real money. $22.6 billion, in fact. According to the annual Amadeus Review of Ancillary Revenue Results released Monday, that’s how much ancillary revenue 50 airlines around the world reported making in 2011, a 66-percent jump from the $13.5 billion that the 47 airlines that reported such income made in 2009.