extern void auth_gsasl_init(auth_instance *);
extern int auth_gsasl_server(auth_instance *, uschar *);
extern int auth_gsasl_client(auth_instance *, smtp_inblock *,
extern void auth_gsasl_init(auth_instance *);
extern int auth_gsasl_server(auth_instance *, uschar *);
extern int auth_gsasl_client(auth_instance *, smtp_inblock *,