use git tag if we are at a given tag. use timestamp otherwise

the boot repositry needs to be signed with a key. We explicitly copy
this to initramfs so users don't need use --hostkeys which requires
access to /etc/apk/keys/

without the key in intramfs the boot repository will be useless

    * is a non-sense have such a big package when a single curl/wget would to the job
    * Alpine is simple,small,secure...this package does not fit with Alpine philosophy

run as collectd user (do not run as root)
split libs utils and disk (add eudev support)
add plugins lvm lua mqtt