Merge branch SRB2:next into tsourdt3rdport3

.gitlab/ci/templates/srb2ci.yml

assets/README.txt

assets/debian-template/copyright

debian-template/copyright

doc/specs/udmf_srb2.txt

extras/conf/udb/Includes/SRB222_common.cfg

extras/conf/udb/Includes/SRB222_misc.cfg

src/CMakeLists.txt

src/Makefile.d/detect.mk

src/Makefile.d/haiku.mk

src/Makefile.d/platform.mk

src/Makefile.d/sdl.mk

src/b_bot.c

src/byteptr.h

src/command.c

src/command.h

src/console.c

src/console.h

src/d_main.c

src/d_player.h