message: Don't log an error if we can't set HTTP/2.
diff: @@ -142,10 +142,13 @@ CurlHttpRequest::CurlHttpRequest(LibCurl* libcurl, Env* env)
  TF_CURL_LOG_WITH_CONTEXT_IF_ERROR(
  libcurl_->curl_easy_setopt(curl_, CURLOPT_NOSIGNAL, 1L),
  "Disabling signals");
  - TF_CURL_LOG_WITH_CONTEXT_IF_ERROR(
  - libcurl_->curl_easy_setopt(curl_, CURLOPT_HTTP_VERSION,
  - CURL_HTTP_VERSION_2_0),
  - "Setting HTTP version");
  + // We don't log an error here because HTTP/2 support may not be built into
  + // cURL, and we'd spam the logs.
  + //
  + // TODO(jhseu): Enable HTTP/2.
  + CURLcodeToStatus(libcurl_->curl_easy_setopt(curl_, CURLOPT_HTTP_VERSION,
  + CURL_HTTP_VERSION_2_0))
  + .IgnoreError();
  // Set up the progress meter.
  TF_CURL_LOG_WITH_CONTEXT_IF_ERROR(
  