Add XDG_STATE_DIR
A few years ago, there was a discussion about an XDG_STATE_HOME
folder. I also found a patch that adds XDG_BIN_HOME
deep in the
mailing list's archive (which, by the way, is still not merged
@maintainer).
I've made a patch similar to the one adding the bin
directory based
on the discussion mentioned above.
Mailing list discussion: https://lists.freedesktop.org/archives/xdg/2019-August/014183.html