Idea #21323
Updated by Tom Clegg 4 months ago
From #20318#note-19
* If the systemd $*_DIRECTORY variable is set, use that.
* Otherwise, if the XDG $XDG_*_HOME/$XDG_*_DIR variable is set, use that. (See #21020)
* Otherwise, default to current behavior.
* Update our systemd unit files to use the *Directory directives.
https://www.freedesktop.org/software/systemd/man/latest/systemd.exec.html#RuntimeDirectory=