Improvements to HAPROXYHTTP pattern.
Improvements to HAPROXYHTTP pattern.

* haproxy may log "<BADREQ>" in http_request which was not previously
  matched.

* http_request's closing '"' should not be collected with the optional
  http_version, it is required.

joekiller/logstash-kafka,opentable/logstash-kafka,joekiller/logstash-kafka,tinglinux/logstash-kafka,Aloomaio/logstash-kafka,opentable/logstash-kafka,tinglinux/logstash-kafka,Aloomaio/logstash-kafka