uken/fluent-plugin-elasticsearch — pull request #11 by harukasan (2013-08-22 13:23:23+00:00)
Title: add logstash_prefix option

Hi.
[Kibana3](http://three.kibana.org/) can use specified logstash indexes (ex. mylogstash-YYMMDD).

So I want to specify logstash index prefix like below:
```

type elasticsearch
include_tag_key true
tag_key _key
logstash_fomat true
logstash_prefix mylogs

```

This may be the same issue as [#10](https://github.com/uken/fluent-plugin-elasticsearch/pull/10).