AddOptionHandler
if (!interface.LCP().AddOptionHandler(fACFC)) {
if (!LCP().AddOptionHandler(mruHandler) || mruHandler->InitCheck() != B_OK) {
if (!LCP().AddOptionHandler(authenticationHandler)
if (!LCP().AddOptionHandler(pfcHandler) || pfcHandler->InitCheck() != B_OK) {
bool AddOptionHandler(KPPPOptionHandler *handler);