To force that, I've changed the Register interface (and thus GenRegister)

The rationale is that:
- in lurette mode, they should be the same for all algos already
- in batch mode, action declarations are ignored anyway (except in custom mode)

Indeed,  the  generated  oracle  and daemons  were  not  syntactically
correct in such cases, e.g., if an action was named "I(p)".