y-ken/fluent-plugin-geoip — pull request #5 by muddydixon (2014-01-15 12:56:44+00:00)
Title: enable to use nested ip in record

I want to use nested key in record for lookup key.

configure bellow:

```
geoip_lookup_key host.ip
enable_key_city geoip_city
remove_tag_prefix input.
add_tag_prefix geoip.
```

fluentd with this configuration can add geographical information to `{'host' => {'ip' => '66.102.3.80'}, 'message' => 'valid ip'}`.