Thanks for the help. I should have seen that my self.
Now it is working. But I have another thing. I need to add and remove some header on some of the sites. I could extend it like I did with auth. But I only need this settings on 1 of the about 20 sites. Is there a better way to do it then have a map with 5 or 6 rows?
I saw this example in Matts post:
@customer2 host customer2.example.com
reverse_proxy @customer2 10.0.0.2:9000
But can I put a braket around that and specify other settings as well?