[r=andreserl,gmb][bug=][author=andreserl] Replace squid-deb-proxy; run our own proxy. Places a proxy on port 8000 for backwards compatibility, but also provides a transparent proxy if iptables are configured for such case.
This that can be done in MAAS is to generate a maas-proxy template that configures the proxy in different ways, including allowing only networks that MAAS manages, instead of all.