Fixes the related bug, everything works as expected but log gets the occasional line of:
cockpit-tls: gnutls_handshake failed: A TLS fatal alert has been received. This is apparently from the self-signed certificate being used on my test setup and the browser refusing to continue with the request when it sees a self-signed certificate.
Package upgrades cleanly over a copt-build 1.6. Running /upgrade inside the client works without issues and the 1.7.1 is loaded after the upgrade finishes.