유저 삭제 루틴을 IOCP로 넘김

Server/src/ServerManager/ServerManager.cpp

@@ -5,6 +5,13 @@
 namespace Chattr {
 
 void ServerManager::_IOCPClient(Chattr::ThreadPool* thread, Chattr::IOCPPASSINDATA* data) {
+    if (data->event == IOCPEVENT::QUIT) {
+        if (userSocket2UID_.find(data->socket) != userSocket2UID_.end())
+            deleteUser(userSocket2UID_[data->socket]);
+        delete data;
+        return;
+    }
+
     Chattr::Packet pack;
     int packetSize = data->transferredbytes;