The request_get_vs function finds the VirtualServer* to which a request is directed.
The returned VirtualServer* is valid only for the current request. To retrieve a virtual server ID that is valid across requests, use vs_get_id.
const VirtualServer* request_get_vs(Request* rq);
The VirtualServer* to which the request is directed.
Request *rq is the request for which the VirtualServer* is returned.