Permit Root Login?
If this is set to 'Enabled' then the SSH daemon will accept logins as the root
user. If this is disabled then only normal, non-privileged users will be able
to login to the system.
It is good practice to keep this disabled, SSH in as user in the 'admin'
group, then sudo to do things which require root privileges.
This change takes effect immediately, but existing connections will not be
terminated.