After discussing with paxed, I decided that instead of reducing the
safe enchantment limit for magical armor, it is instead better to
make the scrolls less effective on it. So this commit restores the
previous rules for the safely-enchant-from level and changes the
effectiveness of the scrolls to compensate.
Non-elven magical armor now only gets +1 from blessed scrolls of
enchant armor when enchanted from +3, coming to a total of +4. But
scrolls of enchant armor are now more effective on nonmagical and
elven and previously unenchanted armor, giving more of an incentive
to use them in the early game.
Cursed and uncursed scrolls of enchant armor are now also more
powerful than they were (but less powerful than blessed scrolls),
hopefully making it a more interesting decision as to whether to use
scrolls of enchant armor even if you don't have the means to bless
them.
3edd07b23e