videlalvaro/rabbitmq-recent-history-exchange — pull request #6 by mweibel (2013-11-28 06:57:00+00:00)
Title: If header 'X-Recent-History-Store' set, don't store the message

Using the header `X-Recent-History-Store` users of the recent history
exchange can specify whether a message should be stored or not.
If set to false, the message with this header will not be stored.

I don't know if you want to have this extension but for me it's quite useful :)