rc: add NeedsRequest to call.

fs/rc/rcserver/rcserver.go

@@ -248,7 +248,6 @@ func (s *Server) handlePost(w http.ResponseWriter, r *http.Request, path string)
 			return
 		}
 	}
-
 	// Find the call
 	call := rc.Calls.Get(path)
 	if call == nil {
@@ -261,6 +260,10 @@ func (s *Server) handlePost(w http.ResponseWriter, r *http.Request, path string)
 		writeError(path, in, w, errors.Errorf("authentication must be set up on the rc server to use %q or the --rc-no-auth flag must be in use", path), http.StatusForbidden)
 		return
 	}
+	if call.NeedsRequest {
+		// Add the request to RC
+		in["_request"] = r
+	}
 
 	// Check to see if it is async or not
 	isAsync, err := in.GetBool("_async")