OpenVPN config download has misleading file extension
When downloading the configuration for a VPN client, the downloaded file is named 'turris.conf'. Most OpenVPN clients, such as the popular OpenVPN Connector available from openvpn.net, expect (and enforce) the filename suffix of a profile to be '.ovpn' rather than '.conf'. Hence the user currently has to rename the file before being able to make use of it. It'd be better to directly choose a filename having the '.ovpn' suffix for better interoperability with OpenVPN clients.