Merge branch 'master' into update-libs

CMakeLists.txt

appveyor.yml

src/Makefile.cfg

src/apng.h

src/command.c

src/d_clisrv.c

src/d_clisrv.h

src/d_main.c

src/d_netcmd.c

src/d_netcmd.h

src/d_netfil.c

src/d_player.h

src/dehacked.c

src/doomdata.h

src/doomdef.h

src/doomstat.h

src/f_finale.c

src/g_game.c

src/g_game.h

src/hardware/hw_cache.c