mux.Handle("/arvados/v1/links/", rtr)
mux.Handle("/login", rtr)
mux.Handle("/logout", rtr)
+ mux.Handle("/arvados/v1/api_client_authorizations", rtr)
+ mux.Handle("/arvados/v1/api_client_authorizations/", rtr)
hs := http.NotFoundHandler()
hs = prepend(hs, h.proxyRailsAPI)