- Add null output. Not sure if it'll get used, but it could be useful

for helping benchmark or debug a filter or input when output isn't
  necessary.

lib/logstash/outputs/null.rb

@@ -0,0 +1,13 @@
+require "logstash/outputs/base"
+require "logstash/namespace"
+
+# A null output. This is useful for testing logstash inputs and filters for
+# performance.
+class LogStash::Outputs::Null < LogStash::Outputs::Base
+  config_name "null"
+
+  public
+  def receive(event)
+    # Do nothing
+  end # def event
+end # class LogStash::Outputs::Null