A test file for filetransfer. Shouldn't exist here.

Signed-off-by: dwSun <tonghuren@gmail.com>
A functional version with file checksum and a more natured protocol.
Still in draft version, may not be fully functional.
1. check sum add
2. file size check add, one file large than 1M, a buffer length as 1M will be use
3. more log add
4. retry logical add.

Signed-off-by: dwSun <tonghuren@gmail.com>