401 unauthorised and stopped sync

Hi,

I've encountered various issues with HTTP 401 leading to a failed authentication and thus stopped synchronisation.

Cause: A URI/filename with a "+" character causes the HMAC256 to fail verification of the server_uri.

Fix: rawurlencode does not convert the "+" sign to a space and the hashes match.

The issue was traced and fixed for us by changing plugins/authfront.keystore/KeystoreAuthFrontend.php
array_map urlencode -> rawurlencode

Best
MR

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