improve code and comment

rustfs/src/main.rs

@@ -384,7 +384,6 @@ async fn run(opt: config::Opt) -> Result<()> {
         loop {
             debug!("waiting for SIGINT or SIGTERM has_tls_certs: {}", has_tls_certs);
             // Wait for a connection
-            // Wait for a connection
             let (socket, _) = {
                 #[cfg(unix)]
                 {

rustfs/src/server/service_state.rs

@@ -36,7 +36,9 @@ fn notify_systemd(state: &str) {
 #[derive(Debug)]
 pub enum ShutdownSignal {
     CtrlC,
+    #[cfg(unix)]
     Sigterm,
+    #[cfg(unix)]
     Sigint,
 }