Adhere to XDG Base Directory Specification

[Mailaender]

The hardcoded

cdogs-sdl/CMakeLists.txt

Line 156 in d99a199

set(CDOGS_CFG_DIR ".config/cdogs-sdl/")

breaks flathub/io.github.cxong.cdogs-sdl#1.

https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html

[cxong]

What's the tl;dr of this? XDG_CONFIG_HOME defaults to .config so why doesn't this work? Does the spec say the config files (this game uses 3 or 4 different files) should all be in .config and not a subfolder?

[Mailaender]

Don't hardcode at build time. Use the environment variable at runtime. Even though in the default configuration, the result is the same. This is useful in this case for backwards compatibility.

[cxong]

Pushed a PR but I don't have a linux to test it, can you help verify that this resolves the issue?

[Mailaender]

I still get

ERROR [MAIN ] [player_template.c:110] PlayerTemplatesLoad(): loading player templates 'players.cnf'

but saving settings works.