It's becoming more and more popular to use hardware tokens ("security keys") using FIDO/U2F to authenticate to services on the web. This is a problem when using ThinLinc as the browser in the ThinLinc session doesn't have access to the token plugged in to the client device. We should forward access to these devices just like we do for many other local devices.
https://community.thinlinc.com/t/anyone-working-fido2-token-forwarding-support/904