# File lib/em-http/http_encoding.rb, line 114
    def encode_headers(head)
      head.inject('') do |result, (key, value)|
        # Munge keys from foo-bar-baz to Foo-Bar-Baz
        key = key.split('-').map { |k| k.to_s.capitalize }.join('-')
        result << case key
          when 'Authorization', 'Proxy-Authorization'
            encode_auth(key, value)
          else
            encode_field(key, value)
        end
      end
    end