Photo by Kyle Gustafson // http://photokyle.com/ Big news for D.C. United fans. The Washington Convention and Sports Authority and concessions manager Sodexo have reached an agreement to bring several new food options to RFK Stadium this season, including Ben’s Chili Bowl. Ledo Pizza and Fat Face Bar-B-Que will also be opening inside the stadium. The Ben’s news comes after two successful seasons at Nationals Park. The landmark local eatery’s move into concessions in 2008…