update change log.

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# RT-Thread v3.1.4 Change Log
Change log since v3.1.3
## Kernel
* Split the component automatic initialization to component automatic initialization and main funciton;
* Fix RT_IDLE_HOOK spelling issue;
* Add thread waiting for message queue when queue is full;
* Fix the issue of delete mq in `rt_mq_create` in some abnormal case;
* Remove the C++ keywords in the`rt_console_set_device`function;
* Remove the `suspend_thread_count` member from memory_pool structure;
* Fix the issue when block = NULL in rt_mp_free;
* Fix the issue of critical protection when `rt_thread_delete` change the status of thread;
## Components
* Fix the issue of mPool size in C++ / Queue;
* Add the error status return in C++ / Thread task join/wait function;
* Fix compilation warning in DFS/ELM FatFS;
* Add support for Linux NFS Server in DFS/NFS;
* Fix mkfs issue in DFS/UFFS;
* Add ftruncate, flock, getuid, umask APIs;
* Fix the display issue of fd with offset in list_fd command;
* Add `dfs_mount_device` API to mount a file system on a device which is already in mount_table;
* Rename the C++ keywords in DFS/rename function;
* Connnect dfs/poll, select with RT_USING_POSIX in Kconfig;
* Optimize the part of the code of finsh to make it more simple;
* When RT_USING_DEVICE is not used, finsh can use the `rt_hw_console_getchar()` function which is simple to implement and not using the device framework;
* Increase the line length of the finsh shell to more than 256 characters;
* utest can support clang compiler and C++ compiler;
* Fix possible cross-boundary issues in ulog;
* Fix compilation warning in `ulog/ulog_console_backend_output`;
* Add support for file sending and receiving feature in YModem;
* CRC16 can be calculated without the lookup talbe to reduce code size in YModem component;
* Fix the issue that stack may be wrongly released during pthread/destory;
* Fix the possible memory leaks issue which caused by pthread_create abnormal case;
* The timer-related APIs under different compiler of libc are moved to the `libc\compilers\common` folder;
* Remove redundant definitions in `dlib/sys/unistd.h` (which will cause compilation warnings);
* Add `sys/errno.h` and`sys/signal.h` header files under dlib;
* Freemodbus is no longer in the kernel, and split it as a standalone softwre package;
* AT socket updated to v1.3.0:
- Add multi-client and multi-device function support in AT Socket, and improve the dirty data handling when AT device hardware module reboot;
- Support netdev network card feature, which can manage and control AT device network connection through the network card interface;
* Improve AT Server function support in AT components, add AT Server data sending and receiving interfaces `at_server_send ()` and `at_server_recv ()`;
* Fix the issue of `closesocket()` in SAL component when socket closing failure after `shutdown()`;
* Improve `sal_bind ()` network card binding related function in SAL component;
* Add IPV6 related options configuration and function support to SAL and netdev;
* Improve ping command error handling and log display in the netdev;
* Add hostname configuration options and functions in lwIP component;
* Fix the assertion issue of `sys_arch_mbox_fetch()` in lwIP which may occur when a socket is closed;
* Add network card uninstallation function and support for dhcpd service stop function to the lwip component;
* Fix lwIP component compilation failure caused by closing FinSH component;
* Fix the issue that the socket may not be closed during the DHCPD task in the lwIP DHCP server;
* Add `dhcpd_stop()` interface;
* Change log in device driver framework:
* Refactor audio driver framework;
* Fix the issue that the receiving length is 0 in CAN and the issue of returning wrong values;
* Add hardware encryption and decryption driver framework;
* Fix the flag handling issue of `rt_i2c_master_send/rt_i2c_master_recv`;
* Add input capture and pulse encoding driver framework;
* Fix the issue that partition lock is deleted when `rt_mmcsd_blk_remove`;
* Fix the issue that the enumerated capacity of the large-capacity card in MMC/SD exceeded the data range;
* When the SDIO device is initialized, the function's manufacturer and product can also use the information in CIS;
* Improve the interrupt mode handling in the sensor framework, and fix the issue that the memory is not released when registering the sensor;
* More information are provided in command line of sensor framework;
* Add the checking for Rx buffer size in the serial port framework, and provide a notification when RX buffer full;
* Remove the old Nor SPI Flash driver in SPI framework, and replace with SFUD component;
* Fix some judgements issue in the return value of SFUD;
* Fix the definition warning of `SFUD_FLASH_DEVICE_TABLE` in SFUD;
* Add support for W25Q64DW devices in SFUD;
* Fix FiFo creation failure handling when creating a pipe;
* Fix the issue of releasing RBB in advance in `rt_rbb_destroy()` function;
* Rename the new keyword using of C++ in `rt_rbb_blk_alloc` function;
* Unify the `struct rt_delayed_work` in workqueue to `struct rt_work`;
* Add touch driver framework;
* Add USB Audio class;
* Fix RNDIS plug-in/out issue in USB device stack;
* Add the interface callback function in USB device stack;
* Improve wlan framework, including command line functions, handling of AP name, password length, support for netdev, better configurability, etc.
## BSP and CPU porting
* Add Clang compiler support in ARM-related CPU porting;
* Fix SCB_AIRCR definition issue in ARM Cortex-M0;
* Unify the .data .bss section to 8bytes alignment in GCC tool chain;
* Rerange NXP i.MXRT BSP and add related BSP documents;
* Add i.MXRT1052 ATK Commander, Fire Pro BSP and i.MXRT1064 EVK BSP to the new i.MXRT BSP;
* Fix I2C operation (master_xfer) in LPC54114-lite BSP;
* Add Audio driver in LPC54114-lite BSP;
* Refactor qemu-vexpress-a9's Audio driver and fix the issue of OS Tick accuracy;
* Remove old STM32 BSP: stm32f4xx-HAL, stm32f10x, stm32f10x-HAL, stm32f429-apollo, stm32f429-disco, stm32h743-nucleo;
* Fix the issue of `rt_hw_sci_init()` for opening the global interrupt in tms320f28379d BSP;
* Add support of soft I2C and hardware encryption module to WinnerMicro W60x BSPAES/DES/3DES/RC/SHA1/MD3/CRC);
* Add oneshot WiFi configuration support in WinnerMicro W60x BSP;
* Add more STM32 BSP based on new STM32 BSP framework:
* stm32f072-st-nucleo
* stm32f103-gizwits-gokitv21
* stm32f103-yf-ufun
* stm32f412-st-nucleo
* stm32f427-robomaster-a
* stm32f429-st-disco
* stm32f769-st-disco
* stm32g431-st-nucleo
* stm32h743-st-nucleo
* stm32h750-armfly-h7-tool
* stm32l4r5-st-nucleo
* stm32l452-st-nucleo
* For the new STM32 BSP framework:
* Add DMAMUX support to stm32l4+;
* Update F7 HAL library SConscript;
* Open the SWD port configuration on cubemx in stm32f103-atk-warshipv3 BSP;
* Add support for SD card in stm32f427-robomaster-a BSP;
* Add USBFS driver to stm32f412-nucleo BSP;
* Remove use of device user data on uart driver;
* Add QSPI FLASH support in stm32h743-atk-apollo BSP;
* Optimized Ethernet driver;
* Add hardware encryption and decryption driver;
* Add MIPI LCD driver;
* Add pulse encoding driver;
* Optimize hardware timer driver;
* Add support for UART 7/8 in serial driver;
* Optimize WDT driver;
## Tools
* Optimize scons script for eclipse in order to generate eclipse project better;
* Improve rtconfig.h generator, PATH type configuration can be generated correctly;
* Fix gcc path detection issue when using the default cross toolchain of the Linux distribution;
# RT-Thread v3.1.3 Change Log
## Kernel