And adjust the specfile

Fix call to recover_backup_files in process_queue.

See merge request !3

New versions of Core`s mailman.email.message.Message does not raise KeyError for
an unserializable message.

Also, updating list of Python version we test against to match Mailman Core.

The previous description did not mention the peculiarities of Mailman
being accessed via HTTPS.

Fix documentation of 'base_url' in example configuration

Closes #18

See merge request !6

Add a test for the presence of surrogates in the stringified message.

Closes #25

See merge request !7

Mailman Core now requires 3.6, so test against 3.6-3.8.

Also fix the -head variant which was trying to install mailman from Git
master twice. It's unclear to me why the two URLs are different though.

Test against Python 3.8, not 3.5 and fix -head variant

See merge request !9

Passing the archiver key as a GET query parameter means it shows up
in various uwsgi/server logs. Instead, send it as a HTTP header
which should keep it out of all logs.

This will require updating your hyperkitty package to read the key
from the header. See <hyperkitty!354>.

Fixes hyperkitty#387

Send archiver key as a HTTP header (CVE-2021-35058)

Closes hyperkitty#387

See merge request !8

Use Token as the authorization type.

See merge request !10