I have asked a question on Server Fault about Reverse Proxies. In this case I am not sure whether it's more appropriate to post it on Server Fault or Stack Overflow.
I put it up on Server Fault because it's not a programming related question. However, I see several such questions on Stack Overflow also, e.g., this.
There are a lot of things on SO that should not be here. I agree with your view that this is off-topic and should be on Server Fault.
So just flag or vote to close the question as off-topic and it will be migrated as long as the question is less than 60 days old; if it is older, then it will just be closed as per this.
See this meta question re Apache configuration.
