Encode services JSON as a string

server/http.go

@@ -256,7 +256,8 @@ func (h *Server) handleLogout(w http.ResponseWriter, req *http.Request, session
 	if req.Method == "POST" {
 		data["IsPOST"] = true
 		data["IncludeLogoutScripts"] = true
-		data["ServicesJSON"], _ = json.Marshal(svcs)
+		svcJSON, _ := json.Marshal(svcs)
+		data["ServicesJSON"] = string(svcJSON)
 
 		// Clear the local session.
 		httpSession, _ := h.authSessionStore.Get(req, authSessionKey)