WASHINGTON PROWLER Lost Appetites By The Prowler Published 6/4/2003 12:14:00 AM ROADSIDE BLIGHTOn the road in Egypt on Tuesday evening, headed for the presidential estate of Hosni Mubarak, the 23-car American motorcade passed by a huge billboard that locals have dubbed the "peacemaker sign." It features large artistic renderings of Bill Clinton and fellow international leaders who attended the 1996 Summit of the Peacemakers at this Egyptian spot. Seeing the visage of his predecessor must have really affected President Bush's appetite, because the president spent less than 90 minutes dining with Mubarak before heading back to his...