extern int host_find_bydns(host_item *, uschar *, int, uschar *, uschar *,
uschar *,uschar **, BOOL *);
extern ip_address_item *host_find_interfaces(void);
extern int host_find_bydns(host_item *, uschar *, int, uschar *, uschar *,
uschar *,uschar **, BOOL *);
extern ip_address_item *host_find_interfaces(void);