Worth to add nginx mime.types

[btd]

You may know that nginx another wide popular proxy server, and it has own mime.types db.
That is nearest link. It is short but for some mime types it has additional extenisions.

[dougwilson]

Adding nginx sounds fine to me.

[dougwilson]

Ok, so I added this in a branch https://github.com/jshttp/mime-db/compare/nginx , but since it's adding even more duplicate file extensions, I think we really need to compile a source of ext-to-preferred-mime db before I can merge this.

[dougwilson]

This will land after #20 lands :)!

[dougwilson]

nginx types are now officially a source :)