Redisplay with server-side X11 and Unicode internally.

[Posting this here in case I forget] Perhaps this was obvious to everyone else, but it occurs to me that once we have an internal encoding based on the UCS, we can leverage Ben’s work with the existing Unicode coding systems, which convert between Unicode and the Mule coding, for redisplay with server-side X11 fonts. Simply convert to the Mule encoding before using the existing redisplay code, much as the Xft and Windows code presently converts to Unicode before redisplay. -- “I, for instance, am gung-ho about open source because my family is being held hostage in Rob Malda’s basement. But who fact-checks me, or Enderle, when we say something in public? No-one!” -- Danny O’Brien