Feature: influxdb 1 missing Authentifikation

[RobertHerter]

Hello,

the influxdb v1 Implementation is missing the the Auth possibility for authentifikation:
if (cfg.influxdb_version == 1) {
curl_easy_setopt(curl, CURLOPT_HTTPAUTH, (long)CURLAUTH_BASIC);
curl_easy_setopt(curl, CURLOPT_USERNAME, cfg.influxdb_user);
curl_easy_setopt(curl, CURLOPT_PASSWORD, cfg.influxdb_password);
sprintf(buffer, "http://%s:%d/write?db=%s", cfg.influxdb_host, cfg.influxdb_port, cfg.influxdb_db);

I will try to imlement