Rudder

Work in progess here: https://github.com/Fdall/rudder-techniques/commit/e410ab0e22c92e8558082bea4e5fbb1b579591a8

Work in progess here: https://github.com/Fdall/rudder-techniques/commit/6a3c8a7ac17bba9ebeca14826748e518dd8aedea

After re-reading docs, we should not use timedatectl and stay on easy handling of /etc/localtime which is the GNU way to define the timezone (can conflict with env variables, but historical technique did not manage it so I did not add support for this).

If systemd is found, os-specific conf files should not be used nor existing anymore(we need to test on each supported os).
Finally, adding a BOOL to choose to enable or not the NTP server part, which is a first step before handling different daemon like chrony or systemd builtin ntp.

In audit mode, the clock synchro will always report an error since there is no simple way to check the synchro.