Merge remote-tracking branch 'origin/next' into gtr-fixes

.circleci/config.yml

extras/conf/Includes/Game_SRB222.cfg

extras/conf/Includes/SRB222_common.cfg

extras/conf/Includes/SRB222_linedefs.cfg

extras/conf/Includes/SRB222_misc.cfg

extras/conf/Includes/SRB222_sectors.cfg

extras/conf/Includes/SRB222_things.cfg

extras/conf/SRB2-22.cfg

extras/conf/SRB2_22Doom.cfg

extras/conf/SRB2_22UDMF.cfg

src/CMakeLists.txt

src/Makefile

src/am_map.c

src/android/i_video.c

src/b_bot.c

src/blua/Makefile.cfg

src/blua/linit.c

src/blua/liolib.c

src/blua/lualib.h

src/command.c