Sharing files and images doesn't work

[artenax]

Check this matrix-org/matrix.org#2537

[KitsuneRal]

Quaternion is unfortunately lagging behind with releases. Support for authenticated media requests has been added in version 0.9 of libQuotient, the underpinning library, which will be released later this week; now that I'm more or less through with libQuotient, I'll update the Quaternion repo to use it. Expect Quaternion-from-git to start working again in the nearest days.