Loading the environment on every shell invocation is slow. We can speed
up shell startup a little by skipping this for ever shell because it's
loaded on login by systemd.
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>