As long as I can remember we have had 2 separate sets of squid proxies.
One is url-downloader on a dedicated pair of Ganeti VMs, one in eqiad, one in codfw.
The others are webproxy on installservers, also Ganeti VMs, also one in eqiad and one in codfw.
Does anyone know why we have them both and don't just use a single one?
Do we really need them both?