suggestion about SEO on www.postgresql.org/docs

May I suggest that on the documentation on the current version (now 9.3) is added a link rel=canonical

Ex:
http://www.postgresql.org/docs/9.3/static/

could have

<link rel="canonical" href="http://www.postgresql.org/docs/current/static/" />

I believe this could help google offering the current documentation as a first choice.
Right now it probably considers it as a duplicated content.

Probably not the right place to tell this, but could’t guess who to send this to.

Sorry for the noise



Antony