void dns_name_hash_func(const char *s, struct siphash *state);
int dns_name_compare_func(const char *a, const char *b);
extern const struct hash_ops dns_name_hash_ops;
+extern const struct hash_ops dns_name_hash_ops_free;
int dns_name_between(const char *a, const char *b, const char *c);
int dns_name_equal(const char *x, const char *y);