Remove unnecessary int casts in multi buffer parsing
Use macro GET_WEAPON_FLAGS to hide differences in D1X vs D2X

D2X uses a bigger field due to added weapons, but the idea is the same
in both games.
Hide GM_HOARD tests behind static inline
Hide GM_CAPTURE tests behind static inline
Remove redundant Game_mode guard on multi_strip_robots
Always play a sound when a player escapes the mine
Use macro PUT_WEAPON_FLAGS to hide differences in D1X vs D2X

D2X uses a bigger field due to added weapons, but the idea is the same
in both games.
Rearrange code to simplify merge with D1X
Split out anarchy object deletion predicate to simplify merge
Make vm_angvec_zero a static inline function
Remove unused prototypes
Make PowerupAdjustMapping static const
Move multi.c variables to top of file
Move */main/multi.c -> similar/main/multi.c