Alternate nginx configuration

Following up on @alanton's request to record a configuration we've used at EFF in an issue:

```
log_format main '[$time_local] $status "$request" $body_bytes_sent "$http_user_agent" $geoip_country_code DNT:$http_DNT';
access_log /var/log/nginx/access.log main;
```

With a slightly different logrotate formula:

/var/log/nginx/*.log {
daily
rotate 7
...
}