Incorrect hint on how to start a job when user logs in

[Zygmunt Krynicki]

This section http://upstart.ubuntu.com/cookbook/#run-a-job-when-a-user-logs-in mentions that:

(begin quote)
Add "UpstartJob=true" to file "/usr/share/dbus-1/system-services/org.freedesktop.ConsoleKit.service".

Create a job configuration file corresponding to the D-Bus service, say /etc/init/user-login.conf [12]:

start on dbus-activation org.freedesktop.ConsoleKit
exec /usr/sbin/console-kit-daemon --no-daemon
(end quote)

This is no longer accurate after Ubuntu 13.04 moved to logind and also as pitti puts it:

12:11 < pitti> zyga: indeed; but that seems wrong even now
12:11 < pitti> consolekit is being called/used way before the first user logs in
12:12 < pitti> zyga: one needs to actually listen for CK's/logind's signals for new sessions, or query for current sessions, not just check when the service gets activated