copy guess_fstype from initrd to rootfs-skeleton
setup.sh: fix for slackware setup.
slackware and slackware64 - update distro files
64-bit debian sid now confirmed working.
slackware64 now testing, drop vcs-workarounds.
add perl to slackware basesfs, 64-bit rxvt-unicode needs it.
slackware basesfs: move puppy-repo url to repo-url
debian/ubuntu basesfs: move puppy-repo url to repo-url
builders: use lib or lib64 when cutting down nls.

slack basesfs: remove perl from rxvt dependency.
64-bit slackware now works, update README.