Log Message:
Update to 0.12.0.

Changes:

	o cdboot support on NetBSD >=4.0 (-current).
	o Availability to choose the bootloader through a new option:
	  USE_GNU_GRUB (by default yes).
	o When using GRUB as the bootloader, it is possible to build
	  and install multiple kernels with the target "kernel", it
	  will install the kernels into the ISO image and the menu.lst
	  file will be modified automatically, see MULTIPLE_KERNELS
	  (mklivecd(8)).
	o Various misc fixes.
	o Now /dev uses optimum values for not wasting space.
	o Added -k flag, that accepts a kernel as argument. To build
	  an additional kernel without looking at the config file.