_plug_free_string
void _plug_free_string(const sasl_utils_t *utils, char **str);
if (text->challenge) _plug_free_string(utils,&(text->challenge));
if (in16) _plug_free_string(params->utils, &in16);
_plug_free_string(params->utils, &passcopy);
_plug_free_string(params->utils, &passcopy);