list of keywords in ascmagic probably belongs in the Magic file.
     This could be done by using some keyword like ‘*’ for the offset value.

     Complain about conflicts in the magic file entries.  Make a rule that the
     magic entries sort based on file offset rather than position within the
     magic file?

     The program should provide a way to give an estimate of ‘how good’ a
     guess is.  We end up removing guesses (e.g.  ‘Fromas first 5 chars of
     file) because’ they are not a