lightdm should wait for AFS to come up

[jdreed]

In the Upstart world, it's possible for the greeter to come up before AFS is ready. In a pinch, our greeter can refuse to do anything until AFS comes up if an AFS user is logging in. In reality, there's probably a better way to do this. Perhaps it involves upstart-ifying AFS?

[jdreed]

It's also possible that pam_debathena_hometype should fail under some cases and we can let PAM take care of this?

Jul  9 12:55:42 JDREED-VMWARE-4 lightdm: pam_debathena_home_type: No such file or directory while calling realpath() on /mit/joeuser

[jdreed]

The LP bug suggests changing lightdm's upstart job to add and stopped rc RUNLEVEL=[2345] to the start on conditional, which will wait until all sysV init scripts have finished starting. It notes that this slows down boot, I don't think we care.

[jdreed]

Something is wacky here, because this should have set DEBATHENA_HOME_TYPE to missing, and I should have gotten the error. WTF?

[jdreed]

Ah, lightdm itself is trying to access the user's homedir and failing. We could also try and catch this in the session setup scripts, but "meh".

r25728