Modify chord names

[Robert Schmaus]

Hi everyone,

I've been using Lilypond for a couple of weeks now, and I have to say 
that I absolutely love it! And the magnitude of knowledge and 
helpfulness in this mailinglist is just amazing.

I have a - possibly rather trivial - problem with chord names.
If I enter e.g. "g:13" and "bes:maj7.11+" in chordmode, the ChordNames 
staff prints "G9/add13" and "Bb^/add#11" (where the "^" is the 
Delta-symbol). What I would like to change (i.e. get rid of) are the "add"s.
Is there a way to e.g. override them with an empty string, something 
similar to the "majorSevenSymbol" attribute?

I can't find it in the manuals ...

Thanks a lot in advance!
Best