Correct reversed logic for displaying enemy health bars

This was flipped from what it should be: undead are not supposed to have
visible wounds; other monsters should.
A yet another rock worm + cloud fix.
Extinguish sticky flame when a water elemental engulfs someone.

Unlike partial immersion, this also provides immunity to new flames:
standing in shallow (deep for giants) water or swimming as a merfolk
involves having a sizeable part above the surface.
Correct inverted fast regeneration check
Update Gargoyle manual entry (nicolae)
Don't crash on over-long god abilities in ^

We tried to take a negative-length substring.  This happened with
Nemelex's stack five ability on a 79-column screen.  Now we chop
off excess characters from the end of the ability description,
which in this particular case loses the full stop.
Always turn slimes neutral for Jiyva worshippers when they enter LOS

Waking them up if necessary.
Reflavour boots of the Assassin's special stab attack

To be caused by the boots making you more perceptive of monster
vulnerabilities - stabs with a concealed dagger still using axes skill,
for example, didn't really make much sense.

Maybe they should still have a special message of some sort when stabbing?

Also possibly these effects would make more sense on a hat or something,
rather than on boots.
Don't give Gargoyles innate rElec

They have so many innate resistances and abilities already. rElec is one of the
least relevant and they still fit the weird-partially-non-living theme without
it.
Remove bonus damage from jump attacks

As a cheap positioning tool it'll still be effective, but hopefully not
necessarily used to start every single fight.