rootfs version 1.4.2    2019.02.26      by Winson
  ->Add new command:
    ->LINPAC_SDK: Download recently SDK lib.
    ->OS_version: Get OS version.
    ->getmodbus:  Read value by modbus RTU protocol.
    ->setmodbus:  Set value by modbus RTU protocol.
  ->support I-8213W-3GWA/4GC/4GE.
  ->support I-8120.
  ->support linux bonding.

rootfs version 1.4.1    2018.02.13      by Winson
  ->Modify slot driver to increase eeprom write/read speed.
  ->Add lx3ext driver fix VGA issue.

rootfs version 1.4.0	2018.01.17	by Winson
  
  ->Include LX-8031 device
  
  ->Add mstp 
  
  ->Add GPS PPS time correction. (with I-8211)
    
  ->binary file "icpdas_pps"


rootfs version 1.3.0	2017.06.16	by Winson

  ->Reduce RT kernel boot time.

  ->Fix RT kernel terminal display bug.


rootfs version 1.2.0	2017.03.15	by Winson
  
  ->Support locale
    
    ->ru_RU
    
    ->zh_CN
    
    ->zh_TW
  
  ->Add LAMP server
  
  ->Support PPS 
  
  ->Support Webmin
  
  ->Add command sysv-rc-conf to check daemon status.
  
  ->Add RT kernel
  
  ->Change backplane COM port device file name from /dev/ttySA4 to /dev/ttySA0
  
  ->Change Console port device file name from /dev/ttySA5 to /dev/ttySA1

  
  ->In this version, only apply SDK 0.8.5 or later version.

rootfs version 1.1.2    2017.01.09      by Winson
  ->Fix Fdisk disk problem
  ->Change QC scp method
    ->old:ssh key
    ->new:expect command

rootfs version 1.1.1    2016.12.22      by Winson
  ->Fix QC mram bug

rootfs version 1.1      2016.12.16      by Winson
  ->Add LAN2 MAC setting

rootfs version 1.0      2016.11.28      by Winson
  ->Package new root file system