main: introduce machine specific handling

* machine_kind: differenciate depending on detected machine OS

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

advotracker/src/main.rs

@@ -94,6 +94,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         trace!(target: "advotracker", message = ?res, state = ?state);
         //debug!(message = ?res, state = ?state);
         trace!(target: "advotracker", environment = "system", lang = ?lang);
+        trace!(target: "advotracker", machine = ?&machine_kind);
 
         // testing environment: read from .env file
         dotenv().ok();