Bug#1009367: Evolution ignoring system certificate store

[Stephan Verbücheln]

Package: evolution
Version: 3.44.0-2

Evolution is ignoring the system certificate store. As a result, it is
impossible to validate signed emails (S/MIME). In addition, Encryption
also does not work properly because many certificates are not trusted.

It appears to only affect S/MIME. In my tests, TLS protection of server
connections was still working.

I have reproduced this bug on several machines with Debian Sid, with
various Linux users and with various e-mail accounts. The bug is also
occuring for newly created users.

How to reproduce:
1. Create a new Linux user and log in
2. Launch Evolution
3. Navigate to Edit/Preferences/Certificates
4. Open the “Authorities” tab and note that there are no certificates

The bug does not occur in Debian Bullseye with Evolution 3.38. The bug
does not occur in Ubuntu 20.04 beta with Evolution 3.44 either.
It is possible that this bug is caused by libnss and the ~/.pki
configuration rather than Evolution.