alfred: optionally bundle a lua script for generating a bat-hosts

alfred: optionally bundle a lua script for generating a bat-hosts

Provide a lua script that uses alfred to propagate and collect all
interface mac + names, then generate a /tmp/bat-hosts file.
If there's already a (probably hand-made) /etc/bat-hosts it won't overwrite it,
but if there's none, it will symlink /etc/bat-hosts -> /tmp/bat-hosts

Signed-off-by: Gui Iribarren <[email protected]>
Thanks-to: Joshua Head <[email protected]>
[[email protected]: bumped release number]
Signed-off-by: Simon Wunderlich <[email protected]>