Create a new subfolder for scripts that are called from pam stack.
Switch to using PUAVO_SESSION_PATH to store the session json file path
instead of storing the json itself in PUAVO_SESSION.
Use puavo session to populate extrausers passwd and group files instead
of connecting LDAP directly like puavo-ltsp-login did before.
Start using PUAVO_SESSION_PATH and puavo session to initialise things
instead of doing separate puavo-rest API calls or using lts.conf.
Switch PAM stacks to using the new puavo session scripts.
Do not overwrite PUAVO_SESSION_PATH in non-thinclient cases.