RTSP ANNOUNCE/SET_PARAMETER upload with --use-ascii / CURLOPT_TRANSFERTEXT sends more body bytes than the declared Content-Length (incomplete fix of e

curl refuses RTSP uploads that combine a body with `--crlf` / `CURLOPT_CRLF`, because the LF→CRLF conversion makes the number of bytes actually sent differ from the `Content-Length` curl declares to the server. That guard was added as a security fix:

  if(data->set.crlf) {
    failf(data, "Cannot do CRLF conversions on upload with RTSP");
    return CURLE_BAD_FUNCTION_ARGUMENT;
  }