pg_docs_bot

About

When you search for Postgres related things, an old version of the documentation is sometimes indexed. Similarly, some answers on sites like Stack Overflow link to old versions of the documentation. 

pg_docs_bot helps you avoid having to click "Current" when you get there, or the frustration of reading the information before realising it's out of date, or (even worse) not realising at all.

Features:
* Redirects links to the "current" version
* After redirecting, displays a notice (including a link to the page you were redirected from)
* Avoids redirecting some deprecated features (to avoid 404s)
* Doesn't redirect when coming from another page in the docs, so you can still check old versions (the main problem with generic redirectors)

Limitations:
* Only supports redirecting to "current"
* Works for the English language docs
* Works for v7.0 through v17 links
* The Chrome extension works on a limited list of search engines and stack exchange sites (to avoid needing <all_urls> permission)