extern uschar *string_format_size(int, uschar *);
extern int string_interpret_escape(const uschar **);
extern int string_is_ip_address(const uschar *, int *);
+extern int string_is_ip_addressX(const uschar *, int *, const uschar **);
#ifdef SUPPORT_I18N
extern BOOL string_is_utf8(const uschar *);
#endif