add option in dosbox.conf to set dynamic core cache block size. comments
on the forum seem to indicate "increased compatability with Windows 95"
when the size is 1. that seems to be true, but then that also increases
the possibility of an "out of cache blocks" error if you play certain
DOS games like Duke Nukem 3D. So instead of hard-changing the setting,
it's a dosbox.conf option. It's the best I can do.