Redirecting dead links on the website

[w0rp via Digitalmars-d]

Phobos documentation was restructured, and the new structure is 
good. However, changing the URLs for the documentation has left 
behind a few broken links, some of which I'm seeign in Google 
search results. For example, this page I just saw.

http://dlang.org/library/std/traits/ValueType.html

This is bad for two reasons.

1. For humans, a dead link means that something is just a little 
harder to find.
2. For Google and SEO, the site might lose some ranking in 
searcch results, as popular pages are now probably considered 
dead completely by Google.

We sould track down the old links and redirect to the new 
documentation pages.

I also noticed that we are hosting two different versions of the 
Phobos documentation, one in one format for 2.066, and another in 
another format for 2.067. See these two pages for example.

http://dlang.org/library/std/traits.html
http://dlang.org/phobos/std_traits.html

So again, a series of redirects is needed. If someone has control 
over Webmaster Tools, that would be a good way to find a list of 
404s to sort out.