The working directory doesn't matter for services and login sessions
already cd to the user home directory. This removes one source of global
state manipulation.
This sets PATH, LD_LIBRARY_PATH and runs init scripts for the new root.
In the future this could replace the entire set of services that should
run, restarting any services for which a newer executable is available
in the new root and stopping any services which don't exist in the new
root. This behavior could also be useful for soft-reboots in the future
to handle updates without rebooting the entire system.
Unfortunately the scheme still has to be created by the daemon due to a
kernel bug, but once that is fixed, it would allow delayed spawning of
scheme daemons.
bjorn3