Merge branch 'master' into signpost-cleanup

libs/libpng-src/projects/pngconf.h

libs/libpng-src/projects/pnglibconf.h

src/f_finale.c

src/hardware/hw_cache.c

src/p_mobj.c

src/p_setup.c

src/r_patch.h

src/r_things.c

src/sounds.c

src/v_video.h

src/w_wad.c

src/win32/Makefile.cfg

src/y_inter.c