I can confirm that an uninstall of squid-deb-proxy-client (but not the server on the same machine) has left me with:
Acquire::http::ProxyAutoDetect "/usr/share/squid-deb-proxy-client/apt-avahi-discover";
in /etc/apt/apt.conf.d/30autoproxy.
I can confirm that an uninstall of squid-deb- proxy-client (but not the server on the same machine) has left me with:
Acquire: :http:: ProxyAutoDetect "/usr/share/ squid-deb- proxy-client/ apt-avahi- discover" ;
in /etc/apt/ apt.conf. d/30autoproxy.