this happens to me all the time: when I search for documentation about a specific Kamailio module on Google, I always land on outdated entries usually from Kamailio 1.6.x. 

Although this seems trivial and I could simply update the URL to the current version of Kamailio, this may be not so obvious for new users and they may end up reading expired documentation and/or implementing non-optimal solutions to their problems.

is there a way to only allow indexation of the last documentation? Something like removing the version or adding an HTTP 301 to old entries?

--
Carlos