[FS#264] xen_domu images need change to grub.cfg to boot unattended

[LEDE Bugs]

The following task has a new comment added:

FS#264 - xen_domu images need change to grub.cfg to boot unattended
User who did this - Wilfried Klaebe (Wonka)

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Oh well, I totally botched the syntax of my .cfg snippet.

It's meant to be:

Relevant parts from xen .cfg file for this domU:

disk        = [
                '/dev/vg0/gluon,,xvda',
              ]

kernel      = '/usr/lib/grub-xen/grub-i386-xen.bin'
extra       = '(xen/xvda,msdos1)/boot/grub/grub.cfg'
root        = ''


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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=264#comment746