new python3 divide

error:
```
  File "xxxx/Gopherus/scripts/FastCGI.py", line 17, in FastCGI
    temp1 = chr(len(data) / 256)
            ^^^^^^^^^^^^^^^^^^^^
TypeError: 'float' object cannot be interpreted as an integer
```
TO return A integer
the code should be replaced by 
```
temp1 = chr(len(data) // 256)
```

