999 bottles of map/history/titles/minor-titles bugfixes on the wall

... And SWMH now explicitly overrides vanilla provinces that it uses so
that they do not change without our knowledge in the future. This is
coherent with the way provinces are selectively loaded now.

A ton of wrong-province barony and all sorts of other errors. Most would only make
the map unplayable (as of 2.3) after/on 1187, but since it only takes 1, I don't think
this was properly functioning after 1100 starts or so.