[FS#123] Root passwordless logins allowed even if there is an SSH public key, and user is not warned of this

[LEDE Bugs]

The following task is now closed:

FS#123 - Root passwordless logins allowed even if there is an SSH public key, and user is not warned of this
User who did this - john (john)

Reason for closing: Fixed
Additional comments about closing: commit 63bd73a5cfc3501c7fbeacb629da12d8278ea352 fixes this

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=123