一些优化

优化 Date.prototype.format
修复题目分类解析错误的问题
Interface Tdoc
X-Forwarded-For 支持

hydro/handler/judge.ts

@@ -155,6 +155,8 @@ class JudgeHandler extends Handler {
 }
 
 class JudgeConnectionHandler extends ConnectionHandler {
+    processing: any;
+
     async message(msg) {
         if (msg.key === 'next') await next(msg);
         else if (msg.key === 'end') {