The previous patch 9ffcecf86a was
completely wrong.
It tried to fix callers that provided a floating GVariant reference.
We require the caller to unref @secrets, so the correct fix it to
ensure that the reference is not floating.
Fixes: 9ffcecf86a
Fixes: 6793a32a8c
VPN connections always return true for nm_connection_need_secrets(), but the
documented behavior of GetSecrets() is just to return any secrets we have
(otherwise nmcli c --show-secrets would not be useful for VPN connections).
