[Change] PixivURL 调整RankingContentType.ALL名称(ALL -> TYPE_ALL);

[Add] PixivDownload 增加调试日志信息;
[Fix] RandomIntervalSendTimer 修复cancel方法无法停止定时器的问题;

src/main/java/net/lamgc/cgj/bot/RandomIntervalSendTimer.java

@@ -133,6 +133,7 @@ public class RandomIntervalSendTimer extends TimerTask {
     @Override
     public boolean cancel() {
         start.set(false);
+        loop.set(false);
         return super.cancel();
     }