letterspacing

[Thierry Bouche <Thierry.Bouche@ujf-grenoble.fr>]

Hi,

I remembered that some integer constant in fontinst allowed to produce
a letterspaced (track-kerning) font at once. I can't find it
anymore. Has this vanished (optimization against all those 0 width
RULEs? also known as semi-infinite negative width rules;-) or did I
dream? 

Anyway, does someone have a simple solution to this problem: do i have
to \resetglyph _all_ encoded glyphs à la \cscglyph? or can i hook the
kerning code somewhere?

Thanks!
Thierry Bouche, Grenoble.