fix: don't attempt to reconnect when the bot is stopping

src/main/java/me/chayapak1/chomens_bot/Bot.java

@@ -363,6 +363,8 @@ public class Bot extends SessionAdapter {
 
         if (printDisconnectedCause && cause != null) logger.error(cause);
 
+        if (Main.stopping) return;
+
         if (!isTransferring) cookies.clear();
 
         int reconnectDelay = options.reconnectDelay;

src/main/java/me/chayapak1/chomens_bot/Main.java

@@ -44,7 +44,7 @@ public class Main {
 
     private static boolean alreadyStarted = false;
 
-    private static boolean stopping = false;
+    public static boolean stopping = false;
 
     private static int backupFailTimes = 0;
 
@@ -180,8 +180,7 @@ public class Main {
 
     public static void stop (final int exitCode, final String reason, final String type, final boolean callSystemExit) {
         if (stopping) return;
-
-        stopping = true;
+        else stopping = true;
 
         final String stoppingMessage = String.format(
                 "%s (%s)",