Securelevels and /dev/io documentation inconsistency

[Alexandros Kosiaris]

> It looks like it does.  Would something like this be satisfactory?
>
>     1           Secure mode - the system immutable and system
>                 append-only flags may not be turned off; disks for
>                 mounted file systems, /dev/mem and /dev/kmem may not be
>                 opened for writing and /dev/io (if your platform has it)
>                 may not be opened at all; kernel modules (see kld(4))
>                 may not be loaded or unloaded.
>
> Regards,
> Giorgos
>

Yes it would be. Thank you.