Delete duplicate :host default
Merge pull request #1475 from opscode/jk/dup_host

Delete duplicate :host default
Add specs for CHEF-5355. Only pass on port in Host header when unequal 80.
Only pass on port in Host header when it is unequal 80. Fixes CHEF-5355.
Set the correct author.
Default port HTTP port 80 is not passed on in the Host header.
Check that explicit Host headers are passed on unchanged.