IMA secure_boot rules and the kernel_lockdown manpage

[David Howells <dhowells@xxxxxxxxxx>]

Hi Mimi,

I need to add a statement about the IMA secure_boot rules to the
kernel_lockdown manual page.  Is this enough:

	IMA requires the addition of the "secure_boot" rules to the policy,
	whether or not they are specified on the command line, for both the
	builtin and custom policies in secure boot lockdown mode.

I don't know what this actually does/achieves.

David