[pkg-fso-maint] Bug#861284: nodm: Does not associate generated session with a seat

[Benjamin Barenblat]

Package: nodm
Version: 0.11-1.3

Sessions launched with nodm are not associated with a seat inside
systemd-logind.  This causes polkit to fail to register the session as
a local session, which in turn causes extra password prompting when
attempting to perform privileged operations like rebooting the system.

Steps to reproduce:
1. Install nodm.
2. Use it to launch a session.
3. Run `loginctl`.

Expected result: There's one session, and it's assigned to a seat.  On
my system:

    ~> loginctl
       SESSION        UID USER             SEAT
             1       1000 bbaren           seat0

    1 sessions listed.


Actual result: There's one session, but it's not assigned to any seat.
On my system:

    ~> loginctl
       SESSION        UID USER             SEAT
             1       1000 bbaren

    1 sessions listed.