log: notice ctrl-c received

sdgb-cli/src/main.rs

@@ -37,6 +37,7 @@ async fn main() -> Result<(), Box<dyn snafu::Error>> {
     nyquest_preset::register();
 
     ctrlc::set_handler(|| {
+        warn!("received early-quit request! will abort soon");
         EARLY_QUIT.store(true, Ordering::Relaxed);
     })?;