[CentOS-devel] [opstools] fluentd packaging

In working with the fluentd packaging from the opstools sig, I think we need to make at least two changes:

- For type=tail sources, fluentd really wants a pos_file parameter to track the file position. It would be helpful if we created /run/fluentd via /etc/tmpfiles.d as a common location for storing these files.

- I think that the *_secure_forward plugins (which permit using ssl for communication between a fluentd client and a collector) are going to be a necessity for just about everybody, so these should probably be packaged in manner similar to the elasticsearch plugin.