* Add second-priority potential places where to add REVISION;
* Better WANTLIB tweaking: it should now roll and unroll
${MODFOO_WANTLIB} items in WANTLIB declarations correctly.
Some of those were rotting in my tree for months. Sorry for laziness. :-\
There is still tests/portbump/t5 failing, I'm working on it. Sloooowly...