acl --staged referencing /data and ends in an exception

```
% acl --staged
Access-lists currently staged in /data/tftproot (listed by date):

Traceback (most recent call last):
  File "/opt/bin/acl", line 90, in <module>
    os.chdir(tfdir)
OSError: [Errno 2] No such file or directory: '/data/tftproot'
```
