use the example of a proxy on the hypervisor
respect the (possibly null) proxy setting
still have to use cobbler account and sudo as far as I can see
document proxy support in chef-bcpc
Merge branch 'master' of https://github.com/bloomberg/chef-bcpc
remove mentions of squid for now, it is not necessary, may be confusing. Explain more about using a local proxy, especially how to fix DNS errors for non-public proxies if specified by hostname