This will make it easier to get all logs for a given bug; preventing users
needing to run scripts to download all files.
- we cannot make the link exist in the directory listing as there are scripts
that automate downloads which would pick this up.
- Unsure if "?format=tar.gz" is the right option to enable this; I couldn't think
of something easy to do but hard to not get picked up by existing automation, and
wouldn't conflict with existing filenames.
