Add parameter to select the field that provides the GELF short message.
Add parameter to select the field that provides the GELF short message.

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