#393 Update nginx.conf HTTP includes when a new host is added

I don't think it works that way if you had it inside the grep command it would work (if it had ``.`` before ``*``) but right now it just means literal ``*``, so the resul of this ``if`` will always be true.

Something like this I think is a better check:
```
if ! grep -q '%1$s' %2$s ]]
```

This will be ``true`` only when grep will not find *.hosts.conf