Merge branch SRB2:next into server-check-files-progress

src/hardware/hw_cache.c

src/hardware/hw_drv.h

src/hardware/hw_glob.h

src/hardware/hw_main.c

src/hardware/r_opengl/r_opengl.c

src/lua_colorlib.c

src/netcode/d_net.c

src/r_data.c

src/r_data.h

src/r_defs.h

src/r_draw.h

src/r_draw8.c

src/r_draw8_npo2.c

src/r_plane.c

src/screen.c

src/screen.h

src/sdl/hwsym_sdl.c

src/sdl/i_video.c

src/z_zone.c

src/z_zone.h