fluent/fluent-plugin-mongo — pull request #14 by muddydixon (2012-05-07 06:38:59+00:00)
Title: Improve tag_feild

In this patch, we use "tag_field" option.
If the option is set true, tag is inserted in each records.

in such configure
```

type mongo
database test
collection test
host localhost
port 27017

tag_field
remove_tag_prefix access.log
tag_field_name TYPE

````

bellow json objects are inserted
```
{"_id": XXXX, "time" : ISODate("2012-05-07T06:36:21Z"), "TYPE": "records"}
```