HTTPConnectionImpl: disabled system proxies for socks creation, we use our own socks implementation

git-svn-id: svn://svn.appwork.org/utils@2031 21714237-3853-44ef-a1f0-ef8f03a7d1fe
git-svn-id: svn://svn.appwork.org/utils@2032 21714237-3853-44ef-a1f0-ef8f03a7d1fe