sysutils/grub2: multiboot is still working?

[Frédéric Fauberteau <triaxx%NetBSD.org@localhost>]

Hi,

grub-mkconfig generates (in a submenu) lines for both boot methods:
- knetbsd
- multiboot
but when I select the multiboot choice, I get the following errors:
--- grub error ---
error: no multiboot header found.
error: kernel must be loaded first.

Press key to continue... (approximate translation since messages are 
i18ned)
--- /grub error ---

The line from grub.cfg is:
    multiboot /netbsd /netbsd root=dk3  -z
but
    multiboot /netbsd
does not work either

I plan to investigate, but if multiboot is broken, the reason becomes 
obvious...