Do not do anything in 90-puavo-setup-puavo-config if host has not
booted from network.  Saves a bit of time in laptop boot.
Set "ignore-user-dmrc=true" in lightdm.conf.  Needs patched lightdm
to work.  This is needed in situations when .dmrc contains
"Session=nonexistent" or some such and thus prevents logins.
But currently in our system we do not see any need for .dmrc,
so we just have a big switch that turns it off.