Log message to [typically] stderr.
Referenced by FX::TnFXSQLDBImpl::checkForOverflow< true, FXulong, FXlong >::Do(), QDictByMemLoadResize(), QDictByMemLoadResizeAggr(), FX::QDictBase< FX::FXString, type >::statistics(), and FX::FXLRUCache< FX::QDict< type > >::statistics().