Selenium link on release note broken if stack created using Swarm

If stack has been created using swarm, Selenium link on release note page is broken: https://selenium.swarm-tes-proxyela-random-number.us-east-1.elb.amazonaws.com.xip.io

It tries to create the same link, as it would have done if we would have been using just the IP address of the stack, meaning it has a subdomain and also adds the extra "xip.io"

This can be worked around by using the public IP of the outer proxy directly to access the stack I think.

@nickdgriffin @arthur-kovalenko Do we have any clue why this happens? The work around does work if using the instance ip.

Just saw this @bzon - it's because the logic for determining the URL is hard-coded for a specific use case and doesn't work for any others, and needs fixing.