Cosa è cambiato in EDuke32, build per build

Also add "zshoot -4096 BOUNCEMINE" to lunatic/test/weaponvars.con to demonstrate that bouncemines can be shot.

There's no point, really. Since the bouncemine is immobile, the tsprites will all be overlaid at one point and show the same picture, as far as I can see. Worse, since r4876, the generated sprites may draw on top of the actual one. The former have their shade always set to sprite[t->owner].shade though, and will then appear fully bright (shade -127, since BOUNCEMINE sets it like this). This fixes issue number 4 from http://forums.duke4.net/topic/8042-five-minor-problems-report/

Also, prettify some ps->fric-related code. DONT_BUILD.

Likewise for blocking wall sprites. This makes it possible to construct underwater sections containing complex spritework without losing the "underwater-ness" when over such sprites, in a backward-compatible way. Actually, the check is for bit 1 being set, but all other bits should be considered reserved.