Most of these are the same as before. For UUOH, I've taken the fixed ITS
conditionals from uuoh.mid.181 (16th March 1981). For MAPPUR, I've put
the Tenex conditional around the whole of the segment-switching code
since none of it is needed on ITS.
Note in particular that the BOT patch is no longer needed -- this
version of Muddle works happily with the pure region at 700000.
