Thanks to @jung for proposing these names.

`sed -i 's/frag_auth_op/frac_auth_frag_op/g' $(find -name "*.v")`

That confuses Gitlab's pretty-printer.

This reverts commit 913059d2.

This reverts commit 849abb8d, reversing changes
made to 8de0b894.  The merge was done
accidentally, before review happened.

This way, it can be used with `iApply`.

This is to be used on top of stdpp's 4b5d254e.