Right now we assume the user's shadow entry will always be available.
If it's not available, we return fields from it initialized to 0.
That leads to spurious password expired notifications in GNOME.
This commit throws a NOT_SUPPORTED error if the shadow file is off
Created attachment 137217 [details] [review]
daemon: don't return account expiration policy if not known
Attachment 137217 [details] pushed as 245d31d - daemon: don't return account expiration policy if not known