As per [their blog post of the 27th
April](https://blog.readthedocs.com/securing-subdomains/) ‘Securing
subdomains’:
> Starting today, Read the Docs will start hosting projects from
> subdomains on the domain readthedocs.io, instead of on
> readthedocs.org. This change addresses some security concerns around
> site cookies while hosting user generated data on the same domain as
> our dashboard.
Test Plan: Manually visited all the links I’ve modified.
As someone said [1] on the internet:
Say ".yaml" not ".yml".
This is not MS-DOS, and YML is a Yahoo XML dialect.
Similarly, we use '.json', not '.jsn'.
[1]: https://github.com/ceph/s3-tests/commit/e17c56a
Adam Chainz
Adrien Vergé