Proposal to remove HTTP config file

No more `chef-client -c http://blah.com/client.rb`, because it is probably not being used, has at least a couple of actual bugs, can be done explicitly by users if they really want it, and has a bunch of code that can be removed.
```ruby
http = Net::HTTP.new('blah.com', 443)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER
instance_eval(http.get('/client.rb').body)
```

I think thats the most compact way to do it. In related news, I booo net::http.