I have updated the new nproc program to use this change in gnulib.
Thanks to Bruno, now nproc has not any logic inside but it is a mere
wrapper around the gnulib module.
I used as arguments to the new program the same names used by the
`nproc_query' enum, except using --overridable instead of
--current-overridable, avoiding the same prefix allows to use the
shorter forms $(nproc --c) and $(nproc --o).
I think --overridable should be the default, and I'm not sure it should
have an option for it.
Paolo
