Merge branch 'next' of https://git.do.srb2.org/STJr/SRB2 into udmf-fofs-mkii

.circleci/config.yml

.travis.yml

Doxyfile

appveyor.yml

bin/Dos/Debug/.gitignore

bin/Dos/Release/.gitignore

debian-template/control

libs/curl/include/curl/curl.h

libs/curl/include/curl/curlver.h

libs/curl/include/curl/easy.h

libs/curl/include/curl/mprintf.h

libs/curl/include/curl/multi.h

libs/curl/include/curl/stdcheaders.h

libs/curl/include/curl/system.h

libs/curl/include/curl/typecheck-gcc.h

libs/curl/include/curl/urlapi.h

libs/curl/lib32/libcurl.a

libs/curl/lib32/libcurl.dll

libs/curl/lib32/libcurl.dll.a

libs/curl/lib64/libcurl-x64.dll