Bug#759264: This change broke proxy support in apt for me

["Lennart Sorensen" <lsorense@csclub.uwaterloo.ca>]

After this change proxy handling is completely broken for me.

I have this for a config:

Acquire::http::Proxy-Auto-Detect "/usr/local/sbin/getproxy";
Acquire::http::Proxy::rceng02.eng.lan "DIRECT";
Acquire::http::Proxy::mirror.eng.lan "DIRECT";
Acquire::http::Proxy::cache.eng.lan "DIRECT";

With apt 1.0.7 it works perfectly, using direct access to sources on
the 3 listed hosts and proxy returned by a script for everything else.

With 1.0.8 it now randomly tries to use the proxy for hostnames configured
to be direct.

I highly suspect this change is the cause of the breakage.

-- 
Len Sorensen