extern uschar *host_ntoa(int, const void *, uschar *, int *);
extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
extern uschar *host_ntoa(int, const void *, uschar *, int *);
extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);