Use relative urls everywhere.

[m-ou-se]

This makes it work to just open site/index.html in a browser locally without having tot spin up a web server.

[m-ou-se]

@pietroalbini - Are you the right person to review this?

[Mark-Simulacrum]

This broadly looks okay, but I'd like to hold off on merging away from a release day (since we're likely to have heavier than typical traffic today) in case there's any problems.

[rylev]

Love the idea! Looks like images that are embedded through the markdown don't work.

[m-ou-se]

Those urls seem to be hardcoded in the posts themselves:

blog.rust-lang.org/posts/2016-08-10-Shape-of-errors-to-come.md

Line 34 in 245723c

<img src="/images/2016-08-09-Errors/new_errors.png" width="500" />

blog.rust-lang.org/posts/2016-08-10-Shape-of-errors-to-come.md

Lines 185 to 189 in 245723c

	[old_errors]: /images/2016-08-09-Errors/old_errors.png
	[new_errors]: /images/2016-08-09-Errors/new_errors.png
	[new_errors2]: /images/2016-08-09-Errors/new_errors2.png
	[new_errors3]: /images/2016-08-09-Errors/new_errors3.png
	[new_errors4]: /images/2016-08-09-Errors/new_errors4.png

They will still work on the website. This PR doesn't change that.

[rylev]

That's fine. I just think this means that there is still a reason to use a web server locally (albeit a small one), and so we should probably reference that in the README by saying that the use of the web server is optional and most everything will work without it.

[rylev]

Marking this as approved because I don't want to block. I still think that the readme should continue to mention using the webserver as an optional way to view the blog locally since there are things that won't work when opening files directly in the browser.

[m-ou-se]

It seems like comrak doesn't have an option to transform urls, but we can just change all the urls in the blog posts to relative ones manually.

[m-ou-se]

Another option would be to generate a <base href="../../../"> tag for every page, and just remove the leading slash on all the absolute urls. It'd affect all relative urls though, so there's a slightly higher chance of accidentally breaking something.

[m-ou-se]

See #980