Mark amulet of guardian spirit as useless with guardian spirit mut (#7118)
Don't allow selecting invalid species via initfile
Don't allow selecting Jesters via initfile

All species are banned for them anyway.
Fix an info leak with amulet of rCorr
Properly give forest drakes the drake genus.
Resync manual from the wiki to fix a doubled word.
Fix monster shape detection for new tengu, and simplify for turtles.
Properly set the gargoyle species' holiness to nonliving.
Don't allow picking a draconian colour in init.txt
Fix some hidden item vaults

Remove one, unhide the items in another.
Indentation fix.
Adjust enemy tengu HP.

They had the same HP per HD as nagas and minotaurs (for the lower tier
tengu); this didn't make very much sense with tengu's purported
fragility.

Tengu, tengu conjurers, and tengu warriors are adjusted downwards; tengu
reavers have their spread narrowed and nudged up slightly to properly
reflect their hybrid status (and so that they're clearly tougher than
warriors).
Add some recently monster-castable spells to the ghost/panlord list.
Don't mark immolation as dangerous for djinn (#7125).
Properly set Z_NOZOMBIE for tengu conjurers.
Comment fix.
Properly set Z_NOZOMBIE for more new career-type monsters, as well as the Pan unique.
"&G harmful" to get rid of non-decorative monsters.
Disable placing of (most) plants in the Lair.

If the "I'm happy to leave levels half-explored" crowd removes reminders
without fixing the bug in question, I'll disable the buggy feature.  The
bug seems to be there for several releases, with no one having good ideas
how to fix it.

Somehow, _add_plant_clumps() seems to not cause problems, but this may
be because it hardly does anything.

On the other hand, a bunch of vault, usually Lair endings, suffers from
problematic plant placement.
Remove zombie name handling for the Serpent of Hell; it can't be zombified.

It's no longer of the dragon species, either, so the handling wouldn't
have gien the right name anyway.