Chord brackets

[Chris Jackson]

Before I get bored of hacking brackets, I'd like to implement vertical
brackets down the side of chords, meaning "don't arpeggiate me". I
suppose this should be done by the arpeggio engraver, and drawn in the
same way as the horizontal brackets. 

But what should the grob be called (Arpeggio, or a new one,
ChordBracket?) and what property should be set to turn it on? Something
like \property Staff.Arpeggio \override #'arpeggio-type = #'bracket ?,
and then use ordinary \arpeggio requests? 

-- 
chris