Changes since 2.23:

o  Fix memory leak in mkfs.cpm
o  Treat forbidden filename characters per version
o  Fix fsck name check with regard to spaces
o  Refactored filename translation for other host OS
o  Fixed -f amstrad broken with 2.23
o  Fix possible buffer overrun in cpmcp
o  mkfs.cpm only created the DateStamper file, but did not
   write its initial content.
o  fsck.cpm now checks DateStamper file mode, extent and size
o  Check for format bug with extent size < 16k
o  Allow to configure extent size
o  Different KB conversion in cpmls for block size < 1024
o  Fixed cpmls -F total used statistics, documented different
   directory entry counts by CP/M 3
