If a BOOTLOADER directive is defined for a node, and the /boot
directory is deployed on a local disk, the specified bootloader will be
installed.
As a convenience, when deploying local partitions, oneSIS creates some links
on the local disk to abstract out the actual device names of the boot device
and the root device.
/dev/oneSIS-boot is created, which points to the actual boot device.
/dev/oneSIS-root is created, which points to the actual root device.
These links can be used when configuring lilo or grub so that the same configuration can be used for all diskful nodes of a heterogeneous cluster without needing to specify the actual device name of the boot or root device.