gives the impression that these files are os-specific when
they're not.
sys_linux.c -> main.c
q_shlinux.c -> q_sh.c
qgl_linux.c -> qgl.c
snd_linux.c -> snd.c
cd_linux.c -> cd.c
rw_linux.h -> rw.h
glw_linux.h -> glw.h
in_linux.c -> in.c (although this isn't referred to at
all in any makefiles anywhere)
- Edited other files to reflect name changes
