Redirect fails behind rproxy

[logicfish]

Running vibenews behind a varnish proxy. After signup, the software redirects to a url containing the local bound port, rather than the one for the proxy.

[s-ludwig]

You need to configure the proxy to set the X-Forwarded-Port (and possibly X-Forwarded-Proto) headers to make redirects work correctly. I don't know how the Varnish configuration for would look like, so if you make it work, it would be nice to put that in the wiki as a reference.