private void logInsecureHttpsFailover(URL url) {
    String log = "Cannot verify server at " + url + ". Attempting again with no TLS verification.";
    logger.accept(LogEvent.warn(log));
  }
Sends the request.

@param httpMethod the HTTP request method
@param url endpoint URL
@param request the request to send
@return the response to the sent request
@throws IOException if building the HTTP request fails.
jib-core/src/main/java/com/google/cloud/tools/jib/http/FailoverHttpClient.java