int  initHTTP(char ***protocols, int *nrprotocols);
 int openHTTP(const char *url, int method, int flags,
                    const char *referer);
  int  doneHTTP(int fd);
 int peekHTTP(int fd);
 int readHTTP(int fd, char *buf, size_t nbytes);
 int writeHTTP(int fd, const char *buf, size_t nbytes);
  int  infoHTTP(int fd, W3ADocumentInfo *buf);
  int  closeHTTP(int fd);
  int  deleteHTTP(const char *url);