configuration needed to forward http request by domain names to another http server

[Relivian]

A single router instance is configured for virtual hosts (hosting several websites) and also serves some API endpoints.
How can the (virtual host) configuration be extended to forward requests for a certain domain to a single HTTP server instance behind the router?

[stevehu]

@Relivian I am very busy these days and it will take me some time to write a tutorial on this topic. I am wondering if you could take a look at this pull request and figure out yourself. It would be even better if you could write a tutorial on it :)

#39