[WIP] Extend exception/cert handling

related to #28 
Did you convert /etc/ssl/certs/ca-certificates.crt in ISO-8891 (I guess it was ISO-5891, not sure). Maybe it give this error only for this particular encoding...

You can try it on the VM I gave you.

The file is `/etc/pki/tls/certs/ca-bundle.crt` on Mageia, you can install it via :

    su
    urpmi rootcerts