The intention is that we should be able to use a mkhowto script from a different checkout; you can still modify the MKHOWTO make variable to do that, but it's not so valuable on the trunk as on the maintenance branches (where we want to use mkhowto from the trunk).
Thomas Heller writes:
Do we? Why?
Definately. I don't want to maintain several versions of the tools; they're almost external application at this point.