Remove use of 'restoring' global var from set_artifact_intrinsic

Also rename 'conduct' argument of setworn_core to 'side_effects'.
oprops: Auto-ID stealth on weapons when wielded

Also tweak message for gaining stealth from an item of stealth from "You
are moving very quietly" to "You move very quietly."
oprops: Fix off-hand weapon properties remaining after ending two-weapon

The defensive code to prevent the off-hand weapon granting item
properties when they shouldn't way back when I ported the feature from
GruntHack was preventing the two-weapon code from unsetting off-hand
weapon properties when ending two-weapon combat.

The code that sets and unsets off-hand weapon properties now allows
those properties to be unset under any condition, but still restricts
setting them to when two-weapon combat is enabled.
Silver short sword (SLASH'EM)

Does d6 damage (d8 vs. large), weight 36.  It's like a slightly weaker,
lighter, rarer silver saber that uses a different weapon skill.

Compared to other blades, short swords fall in an uncanny valley between
the raw damage of long swords and the multi-throwing of daggers.  This
should make short swords slightly more worthwhile.

Breaks save compatibility.
Improve stacking of random candles (AceHack)

... by not randomly blessing or cursing them.  Between wax and tallow
candles, and blessed, uncursed and cursed status, an inventory could be
filled with 6 different candle stacks, even with DynaHack's improved
item stacking!
Allow knife and stiletto as possible tin-opening tools (K-Mod)

K-Mod only includes knives, I figured stilettos would be okay too.
Grant +1 to-hit for all short swords (K-Mod)

Compared to other blades, short swords fall in an uncanny valley between
the raw damage of long swords and the multi-throwing of daggers.  This
should make short swords slightly more worthwhile.