Indeed, the shift from pave to bauges changes its behavior.

Indeed, starting from a clean /tmp dir changed the result of the non reg test...

That was quite confusing for rdbg -lurette --*-stdio !!!

Also, check programs that should fail using lurette instead of just
lus2lic. Indeed, some programs are only suposed to fail at runtime.

Change the main node names of prog in should_fail as it is necessary
for Lurette non-reg scheme

nb : I've transformed all the regressions I've seen into todo entries
in todo.org.

nb 2 : I did not mv the newly broken tests into the broken dirs. I'll
do that for those I do not want to fix in the short term.