The default behaviour of Xvnc is already -nolisten tcp since bug 5241, so it is a bit misleading that we also have it in the default xserver_args. Removing it no longer has any effect, instead users have to add -listen tcp to get X11 over TCP.
Only added information about the changed configuration in release notes and not an actual release note.
Looks good. Verified using build 6127.r34202 on Fedora 30.