Do not get reconnected if AutoWifi is behind a proxy

[ascii]

If AutoWifi is use behind a proxy, Twill will not get last page refresh to test if connected.
I added
 add_extra_header("Cache-Control", "max-age=0")
before
 go("http://www.perdu.com")
in sfrneuf.py file

[Shad (shadow.walker)]

Do you have an example of configuration where the computer connect directly to the wifi but still use a proxy, I've added to extraheader to the code and checked for no regression but I'm curious to test the bug by myself.

[ascii (ascii.dcoders)]

Im using a local proxy on my laptop to allow caching of big file (video, ISO, etc...). I use Squid and my firewall is configured to do transparent proxy. I you want to try yourself, configure Squid as transparent proxy http://wiki.squid-cache.org/SquidFaq/InterceptionProxy and your firewall to redirect http traffic to your proxy. And with FireHOL, i use this command: http://firehol.sourceforge.net/commands.html?#transparent_squid