Fixes:
- Security fixes to client/server file transfers.
- Fixed "Out of thread ids" error when launching Alien Swarm on a computer with 32 or more logical processors .

Balance:

Units with AR2:
- Attack speed increased from 0.11 to 0.09.

Rebels:
Flamethrower:
- Health reduced from 350 to 270.
- Attack range increased from 320 to 384.
- Can attack while moving.
Mount. turret:
- Cost changed from 17/10 to 27/0.

Combine:
Mount. turret:
- Cost changed from 15/8 to 23/0.
Combine Elite:
- Energyball recharge increased from 20 sec. to 50.
- Energyball lifetime reduced from 2.67 to 1.34.
Energy ball:
- Ability cost changed from 30/15 to 30/30.
- Research time increased from 38 sec. to 67.