Default network config causes issues with automatic proxy wpad files - not sure what to log bug against

Hi All,

Long explanation, see further below for the question:

The way ubuntu does it's networking currently is causing some issues with my proxy auto config.
I have a bunch of remote branches, some of these branches have their own internet connection and proxy server, so my wpad.dat file essentially checks what subnet they're coming from via the myIpAddress() function, and returns the correct proxy server accordingly.

The myIpAddress() function as implemented by Unity/Gnome and KDE seems to do a reverse lookup against the /etc/hosts file of the client, and returns 127.0.1.1 which obviously breaks my site detection cases.
I've tried making dns priority over files in /etc/nsswitch.conf, but nothing changes.
The only change that has worked, is to insert a line into /etc/hosts *before* the 127.0.1.1 entry, with my IP address, and hostname eg:

user@myhost:~$ head -n 3 /etc/hosts
10.10.90.16 myhost myhost.fq.dn
127.0.0.1 localhost
127.0.1.1 myhost

This problem affects any browsers/software which reference the system proxy config, eg chromium-browser, google-chrome, konqueror, rekonq (I presume), etc.

I've tested this on Ubuntu 13.10, Kubuntu 13.10, Ubuntu 14.04, Kubuntu 14.04 - both unity and kde proxy managers exhibit the same behaviour.
Interestingly, firefox does *not* exhibit this behaviour if you set it's proxy to auto-detect.

My question is, where do I report this as a bug? Do I put it against Unity/Gnome and KDE? Do I put it against Network Manager? Do I log a bug for all 4 projects and see what sticks?

Thanks -

Appendix:
Example wpad.dat file:
========
function FindProxyForURL(url, host)
{
        myip=myIpAddress();
        alert(myip);

        proxy="PROXY proxy1:3128";

        if (isInNet(myip, "10.10.0.0", "255.255.0.0")) {
                proxy="PROXY proxy2:3128";
        }

        return proxy;
}
========

The output from the alert() function can be accessed using the following url in chrome/chromium:
  chrome://net-internals
 -> events debugging interface, which confirms the ip address that the myIpAddress() function resolves.