CHEF-4762: http_request with action :head does not behave correctly in 11.8.0 fixed
CHEF-4762: added comments about expected return values in http_request with action :head
CHEF-4762: Added a http_request test for testing false return value when not modified response
CHEF-4762: Added some some CHEF-4762 tests for Chef::HTTP#head
spec/unit/http.rb renamed to spec/unit/http_spec.rb
Merge pull request #1183 from onddo/CHEF-4762

CHEF-4762: http_request with action :head does not behave correctly in 1.8.0