Removed gems/logstash-event/CVE-2014-4326 (issue #867).

* The original blog post [1] mentions the elasticsearch/logstash-contrib [2]
  github repository, *not* the logstash-event gem which also does not
  appear to contain the mentioned vulnerable files.

[1]: https://web.archive.org/web/20140804031140/http://www.elasticsearch.org/blog/logstash-1-4-2
[2]: https://github.com/elastic/logstash-contrib

Author: postmodern