Updates v1.121 v3

Update v1.121

This is a quick patch over issue #92 and a minor function updates on file share system.

Change Log

• Fixed filename with hash cannot upload bug (#91)
• Fixed issue for unauthorized file access (#92)
• Optimized read only directory mounting (#90)
• Optimized low memory upload mode quota cutoff response time
• Added advance file sharing options (to selected users or groups)