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Rather than putting this in a newDoc/docutils.conf file, can we putrfc_base_url = 'https://datatracker.ietf.org/doc/html/' in the existingconf.py?

The issue is also impacting python 3.7, 3.8 and 3.9. So I guess I've to create the exact same PR targeting another branch, may you confirm, please?

As you noted at#95789 (comment), the redirects are fixed now on the IETF side, so it's less pressing to get this backported to thesecurity-only branches. Let's ask 3.8/3.9 release manager@ambv.

Rather than putting this in a newDoc/docutils.conf file, can we putrfc_base_url = 'https://datatracker.ietf.org/doc/html/' in the existingconf.py?

That was my first intention. But actuallyconf.py is the configuration ofsphinx.
In our case, therfc_base_url is adocutils configuration (which is a dependency ofsphinx).

I had a look atsphinx source code andthe sphinx configuration is handled independently fromthe one of docutils.

There's arfc_base_url in bothdocutils andSphinx.

We're overriding this setting in Sphinx:

'rfc_base_url':'https://datatracker.ietf.org/doc/html/',

https://github.com/sphinx-doc/sphinx/blob/f45dc5e1398f7850e23003cac200ad3433da2a78/sphinx/environment/__init__.py#L47

To test, I modified that line directly in Sphinx and rebuilt the docs, and it used that modified one.

@hugovk ,

Yes, it's exactly the link I refer in my last message.
I invite you to test, puttingrfc_base_url in theconf.py. Rebuilding the documentation you will see that there is no impact.

(cf.https://www.sphinx-doc.org/en/master/usage/configuration.html)

Ah yes, thanks!

Please could youprefix the title of this PR with "[3.10] " and add anews entry?