int auth_heimdal_server(auth_instance *ablock, uschar *data) {return 0;}
int auth_heimdal_client(auth_instance *ablock, smtp_inblock *inblock,
smtp_outblock *outblock, int timeout, uschar *buffer, int buffsize) {return 0;}
int auth_heimdal_server(auth_instance *ablock, uschar *data) {return 0;}
int auth_heimdal_client(auth_instance *ablock, smtp_inblock *inblock,
smtp_outblock *outblock, int timeout, uschar *buffer, int buffsize) {return 0;}