install all /lib/kbd to initramfs, if not host only
KEYBOARDTYPE=sun|pc
will be written to /etc/sysconfig/keyboard in the initramfs
KEYTABLE=<keytable file>
will be written to /etc/sysconfig/keyboard in the initramfs
SYSFONT= Console font
will be written to /etc/sysconfig/i18n in the initramfs
SYSFONTACM= Console map.
will be written to /etc/sysconfig/i18n in the initramfs
UNIMAP= Unicode font map.
will be written to /etc/sysconfig/i18n in the initramfs
LANG=<locale>
will be written to /etc/sysconfig/i18n in the initramfs
LANG= set locale for all categories, can be any two letter ISO
language code