Add reserved & special domains?

[jessepeterson]

I know the title of the project is freemail, but might also be useful to have a reserved.txt for example.com and .org. But also some common ones like localhost, etc.

http://www.iana.org/domains/reserved
http://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml

[willwhite]

Wow there are way more reserved domains than I released. Great idea. I'd take a PR for this!