char *res_get_def (Res r, const char *name, char *def);
int res_get_match (Res r, const char *name, const char *value, const char *s);
void res_put (Res r, const char *name, const char *value);
char *res_get_def (Res r, const char *name, char *def);
int res_get_match (Res r, const char *name, const char *value, const char *s);
void res_put (Res r, const char *name, const char *value);