New install script is bugged when removing the package. It delete the whole
/usr/lib/modules, so this update is required to avoid big issue!

Info file is removed because it's no more needed

- Use /usr/lib/docker for dockerinit
- Don't strip package (which broke everything)
- Add make-rprivate like in the upstream systemd service file

Take place and not needed on all servers

- add lz4, diffutils, sed
- Setup basic seblu.net config files

- use https url, inside a variable
- forbit invalid pkgname
- doesn't use .sign as they are not supported by makepkg
- upstream patches (rc, stable) are no more prefixed by linux- before downloading
- upstream patches are symlinked instead of copied