These units appear in the journal with the identifier `sh` so set a
sensible identifier for them to aid in log readability
Signed-off-by: Joe Groocock <me@frebib.net>
This moves loading of the environment variables out of the normal
service startup flow and has systemd load the variables early.
Shim ZSH to load the environment.d configuration when running without
systemd.
Signed-off-by: Joe Groocock <me@frebib.net>