[Merge] lp:~jamesodhunt/upstart/add-session-file into lp:upstart

[Steve Langasek]

> This allows Upstart running as a Session Init to conform
> to the XDG specification and remove the XDG_RUNTIME_DIR
> when no remaining session exist.

The session init runs as the user and never has elevated privileges.  The XDG_RUNTIME_DIR is managed by PAM, and cannot be removed by the user (though its contents can) because the parent directory is owned by root.

Does this invalidate the rationale for this branch?
-- 
https://code.launchpad.net/~jamesodhunt/upstart/add-session-file/+merge/144881
Your team Upstart Reviewers is requested to review the proposed merge of lp:~jamesodhunt/upstart/add-session-file into lp:upstart.