- add '[' and ']' as thick line in %%stafflines
- changes
  - treat 'print=' with modifiers as '*'/'all' in %%map
- fixes
  - accept a line number greater than 5 in K:/V: clef=
  - bad stem directions
  - bad detection of some wrong ties
  - bad handling of maxstaffsep (system clash)
  - bad note height of custos
  - loss of decorations when on combined rests
  - lack of ottava brackets when on secundary voice
  - reset the 'execute' mode bits of 'configure' when new release