- Added a number of projectile flags. All reflect flags require REFLECTIVE for them to work.

- THRUREFLECT: Actors cause projectiles to pass through them. Ownership is changed, but nothing else is.
- MIRRORREFLECT: Projectiles do a direct 180 degree turn.
- AIMREFLECT: Projectiles are turned directly to the attacker, and their speed is not slowed.
- HITTARGET/MASTER/TRACER: Projectiles that only die upon touching an actor will set the one they touched as the corresponding target/master/tracer.