Merge pull request #3222 from HubertXie/master

【修复】修复sal判断internet连接的隐藏bug

components/net/sal_socket/src/sal_socket.c

@@ -131,7 +131,7 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
 {
 #define SAL_INTERNET_VERSION   0x00
 #define SAL_INTERNET_BUFF_LEN  12
-#define SAL_INTERNET_TIMEOUT   (2 * RT_TICK_PER_SECOND)
+#define SAL_INTERNET_TIMEOUT   (2)
 
 #define SAL_INTERNET_HOST      "link.rt-thread.org"
 #define SAL_INTERNET_PORT      8101