Default password revamp
Currently FreeNAS uses a default password of 'freenas' for its user interface.
I think it's desirable to implement this way:
- By default, no password is asked. Instead, a reminder is shown on every screen asking the user to specify a password.
- When a password is present, the UI behave like what it is as of today.
- Additionally, user can optionally specify that entering netcli requires root password.
This would make sure that the user specify something rather than the default 'freenas'.