logstash/logstash — pull request #409 by wiibaa (2013-03-19 06:07:27+00:00)
Title: Allow @message, @source etc in match for email output

Fix LOGSTASH-826 and LOGSTASH-823
Also restore lost plugin documentation since https://github.com/logstash/logstash/commit/6c9b36b2279643711b0e5e41a366b0940fac0068