https://gitlab.inria.fr/cado-nfs/cado-nfs/-/tree/hd

 - we put many extraneous <gmp.h> in flint-fft, get rid of them.

 - also, we introduced (by side-effect) cado_config.h in
transform_interface.c, while it had no cado.h ; that was not detected
because we skip all of linalg/bwc/flint-fft/ shouldn't be a problem,
should it ?

https://lists.gforge.inria.fr/pipermail/cado-nfs-discuss/2020-May/001238.html

One can now do:   for(auto x : renumber_table) { /* loop body */ }