OpenGL2: Remove and force r_softOverbright.
Replace deprecated alDopplerVelocity with alSpeedOfSound per OpenAL 1.1 spec
Remove references to alDopplerVelocity

Let's load driver even if it doesn't have the deprecated alDopplerVelocity.
OpenGL2: Fix pshadows for MDR models
Add Bloom lighting support to OpenGL1 renderer
Merge branch 'sdl2' of https://github.com/MAN-AT-ARMS/ioq3