Does setting the properties in the `overrides` do the same thing as specifying the "standard" java.net [JVM proxy properties](http://docs.oracle.com/javase/7/docs/technotes/guides/net/proxies.html)? Because we have had threads on the mailing list where `overrides` haven't worked for users, but the java.net properties have, e.g. http://markmail.org/message/vmjshao3pl66qneq.

I think it might depend on the provider and/or the HTTP driver you're using (standard vs. Apache HC)?