extern int dns_basic_lookup(dns_answer *, const uschar *, int);
extern void dns_build_reverse(const uschar *, uschar *);
extern void dns_init(BOOL, BOOL, BOOL);
+extern BOOL dns_is_aa(const dns_answer *);
extern BOOL dns_is_secure(const dns_answer *);
extern int dns_lookup(dns_answer *, const uschar *, int, const uschar **);
extern void dns_pattern_init(void);