<NME> yaml.rb
<BEF> ADDFILE
<MSG> add yaml config support

Make headway into no longer using custom configuration file. Pass --yaml to
logstash agent to make it treat configuration files as YAML.

<DFF> @@ -0,0 +1,8 @@
+require "logstash/config/file"
+require "yaml"
+
+class LogStash::Config::File::Yaml < LogStash::Config::File
+  def _get_config(data)
+      return YAML.load(data)
+  end
+end

add yaml config support