[exim] Exim 4.86 or 4.87

Hello we want to test your new version 4.86 or 4.87 of exim where you included connections via socks5 proxies. Can you show a specification and configuration about this one? How to connect via socks5 proxies? Because we didn't find it in this specification http://www.exim.org/exim-pdf-4.86/doc/spec.pdf