Need "engineered" way of determining whether certain hotfixes have been applied

There have been recent examples (http://www.couchbase.com/issues/browse/CBSE-399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=50618) where there has been some question whether or not a particular hotfix has been applied.

Relying on the customer to put a certain text file in place is really not the same as being able to tell positively from the logs.

This improvement should cover all aspects of possible hotfixes (Erlang/memcached/anything else)