More secure permissions for /root and /etc/sysctl.conf

[Wojciech Puchar]

>>> I don't see the point in making this change to sysctl.conf.  sysctls
>>> are readable by any user.  Hiding the contents of sysctl.conf does not
>>> prevent unprivileged users from seeing what values have been changed
>>> from the defaults; it merely makes it more tedious.
>> true. but /root should be root only readable
>
> Based on what?  What security does this provide to what part of the system?
based on common sense