extern uschar *spool_sname(const uschar *, uschar *);
extern int spool_open_datafile(uschar *);
extern int spool_open_temp(uschar *);
extern int spool_read_header(uschar *, BOOL, BOOL);
extern int spool_write_header(uschar *, int, uschar **);
extern uschar *spool_sname(const uschar *, uschar *);
extern int spool_open_datafile(uschar *);
extern int spool_open_temp(uschar *);
extern int spool_read_header(uschar *, BOOL, BOOL);
extern int spool_write_header(uschar *, int, uschar **);