move isolinux to /boot directory to keep cdrom more tidy.

mktemp set it to 600 so we need to manually set it to 644

renamed default package list to alpine.packages

Only thing required is a working apk-tools and mkinitfs

Tar could not handle the headers.

This reverts parts of commit 8b1a5301.
Keep the usage fixes.

and install scripts should not be in $source

and relocate the place of the symlink in tar header, as symlink
use the linkname field. now it's split to devmajor, devminor and
padding fields.

we want the sysklogd on the iso

init will only autoadd those when booting