The issue reported here is different than the CNAME issue.
Basically LVFS has gotten a lot bigger and the fwupd 0.7.x release couldn't
handle the size of the metadata now.
Please reference this bug in Ubuntu:
https://bugs.launchpad.net/ubuntu/+source/fwupd/+bug/1829813
This workaround can be backported for it:
https://github.com/hughsie/fwupd/commit/a1e6e7ff254f3409e0bced0fb400073d6e2b96e8
> -Original Message-
> From: Xavier Bestel
> Sent: Monday, July 29, 2019 5:09 AM
> To: 912...@bugs.debian.org
> Subject: Bug#912414: Workaround failed
>
>
> [EXTERNAL EMAIL]
>
> FWIW, even changing the configuration file as described fails:
>
> root@gitlab:~# fwupdmgr --verbose refresh
> failed to update metadata: Failed to parse XML: Mismatched XML
