IN A CLINK STINK By DAREH GREGORIAN August 28, 2004 Welcome to New York. Two protesters arrested for unfurling a Bush-bashing banner at The Plaza say they were mugged and manhandled during their harrowing overnight imprisonment in the bowels of Manhattan Supreme Court. "We were robbed and I was assaulted," Cesar Maxit, 28, said of his and David Murphy's night in the holding cells of 100 Centre St. "They wouldn't even leave us 50 cents to make a phone call." ---Snip--- Murphy said he was fine rappelling down The Plaza — but frightened in jail. "I was really scared,"...