int  initTelnet(char ***mime_types, int *nrtypes, float **qual);
  int  openTelnet(const W3ADocumentInfo doc,  Widget  area, long id);
 int writeTelnet(long id, const char *buf, size_t nbytes);
  int  closeTelnet(long id);
  int  infoTelnet(long id, W3ADocumentInfo *doc);
 void eventTelnet(long id, long source_id, long type, void *params);