Hi !

Among my first contributions, don't hesitate to make comments so that I
can improve ;)

I did a series of patches to add the rust-rbw package, which I enjoyed on
my previous OS. A small error prevented the packages from building,
corrected in this patch.

I'm currently trying to build the resulting crates-io packages at this
place : cuirass.ngraves.fr, and it builds locally.

Cheers,