-extern uschar *parse_quote_2047(uschar *, int, uschar *, uschar *, int);
+extern uschar *parse_message_id(uschar *, uschar **, uschar **);
+extern uschar *parse_quote_2047(uschar *, int, uschar *, uschar *, int, BOOL);
+extern uschar *parse_date_time(uschar *str, time_t *t);
+extern int pseudo_random_number(int);