I now get 

```
$ sudo /etc/init.d/varnish start
 * Starting HTTP accelerator varnishd                                                                                                                                     [fail] 
Message from VCC-compiler:
Symbol not found: 'admin_director' (expected type BACKEND):
('input' Line 38 Pos 25)
    set req.backend   = admin_director;
------------------------##############-

Running VCC-compiler failed, exit 1

VCL compilation failed
```