Do not perform denial of service check in LAN games.

src/net/common/serverlobbythread.cpp

@@ -989,6 +989,9 @@ ServerLobbyThread::HandleNetPacketInit(SessionWrapper session, const InitMessage
 	// Before any other processing, perform some denial of service and
 	// brute force attack prevention by checking whether the user recently sent an
 	// Init packet.
+	// This check is not performed on LAN servers.
+	if (m_mode != SERVER_MODE_LAN)
+	{
 		bool recentlySentInit = false;
 		{
 			boost::mutex::scoped_lock lock(m_timerClientAddressMapMutex);
@@ -1002,6 +1005,7 @@ ServerLobbyThread::HandleNetPacketInit(SessionWrapper session, const InitMessage
 			SessionError(session, ERR_NET_INIT_BLOCKED);
 			return;
 		}
+	}
 
 	// Check the protocol version.
 	if (initMessage.requestedVersion.major != NET_VERSION_MAJOR

src/net/serverlobbythread.h

@@ -223,7 +223,7 @@ private:
 	ServerIrcBotCallback &m_ircBotCb;
 	AvatarManager &m_avatarManager;
 
-	ServerMode m_mode;
+	const ServerMode m_mode;
 	std::string m_statisticsFileName;
 	ConfigFile *m_serverConfig;
 	u_int32_t m_curGameId;