message: With debug HTTP mode log curl's version
  This will hopefully help any future reports where we're trying to
  figure out what's going on with possible different versions of the
  `curl` library.
diff: @@ -603,6 +603,7 @@ pub fn configure_http_handle(config: &Config, handle: &mut Easy) -> CargoResult<
  if let Some(true) = http.debug {
  handle.verbose(true)?;
  + log::debug!("{:#?}", curl::Version::get());
  handle.debug_function(|kind, data| {
  let (prefix, level) = match kind {
  InfoType::Text => ("*", Level::Debug),
  