Merge branch 'combine-dupx-and-dupy' into 'next'

src/console.c

src/f_finale.c

src/hardware/hw_draw.c

src/lua_hudlib.c

src/m_anigif.c

src/m_menu.c

src/m_misc.c

src/r_sky.c

src/screen.c

src/screen.h

src/st_stuff.c

src/v_video.c

src/v_video.h

src/y_inter.c