Log Message:
Update sysutils/mklivecd to 0.8.

Changes:

* Added two new options: PKGSRCDISTDIR and CHROOT_SHELL, to specify
  distfiles directory and the shell to be used in the `chroot' target.
* Remove MESSAGE file, it's useless right now... because
  the `menu.lst' file is created when the `kernel' target has been
  invoked, with default values, ready to boot.
* Replace another `j' tar(1) flag with `z'.