Max FQDN length is 255 but technically can be longer depending on the DNS server used and it's configuration.  I've seen at least a couple of cases where a messed up configuration allowed for a longer than spec. length.  Remove the length restriction and we should be fine.

Also a small style nit, commas should be at the end of the previous line

```python
("foo",
 "bar")
```
Instead of 
```python
("foo"
 , "bar")
```