Update a comment.

Since this doesn't appear to be used by anything other than xomzerk currently.
Fix species/job selection from .prf files (#8956)
Add milestone/logfile fields for MP, max MP, and max MP ignoring equipment.
A few unrand tiles
LRD & Shatter icons
Replace magic enum values with FFT_s in feature-data.h
Remove unused feat_is_rock function.
Clean up terrain.cc slightly.
Remove more comparisons by order in dungeon_feature_type.

This also cleans up and documents some of terrain.cc.
Try to remove the last comparisons by order of dungeon_feature_types.

There are a few left in tags.cc since it's not actually looking at the
meaning; it really does want to know where in the enum it is.
Make a bunch of switches on DNGN_ enums use feat_is_ functions instead.
Pack dungeon_feature_type more tightly on save bump.

Since there's no longer any necessity to put things in a specific place
in the list.
Turn symbol/magic_symbol into methods of feature_def rather than fields.

This eliminates the need for two 0s in field in feature-data.h.
Improve some beam code (|amethyst).

Based on a comment in #8542.
Don't consider lightning bolts to go through trees in tracers (#8542).
Make beams even more unable to hit monsters in walls.
The 0.15 tournament is over; don't annoy people about Trunk games.

This reverts commit 0e45cf2e0fb8731d39b9e744c57bc83bea192582.
Make the captain's cutlass disarmingly good.

It now disarms a monster's weapon with a dam / 75 chance; it shouldn't be
an effect that's happening every combat, just a cool bonus (like the
tendril disarming this is based on code- and idea-wise). The enchantment
is nerfed to +5, since it doesn't need it to be not strictly worse than
an ego item anymore.

Thanks to PleasingFungus for the description change!
Remove 'special' from some unrands.

Two of them (Dispater's and Asmodeus's weapons) are already wielded by
monsters, Wucad Mu is presumably a holdover from when it had variable
pluses, and Vampire's Tooth doesn't seem to have any reason to be not
usable by monsters.
Only use the 'special' unrand flag for what it's claimed to be for.

Presumably most of the cases changed here were not changed correctly
in the unrand/fixedart merge, though the reason for these differences
between them isn't clear either.