Changes form previous version
All previous changes is here.
- [VD:FTP] Fixed #1757 cause infinite loop with getting stat of second level items from system root
- [js:core] Fixed #1761 problem of chunk merge request on 2.1.17
- [php:core] Fixed #1762 broken backward compatibility of PHP < 5.4 on 2.1.17
- And some minor bug fixes
