# File lib/stella.rb, line 162
    def canonical_host(host)
      return nil if host.nil?
      if host.kind_of?(URI)
        uri = host
      else
        host &&= host.to_s
        host.strip!
        host = host.to_s unless String === host
        host = "http://#{host}" unless host.match(/^https?:\/\//)
        uri = URI.parse(host)
      end
      str = "#{uri.host}".downcase 
      #str << ":#{uri.port}" if uri.port && uri.port != 80 
      str
    end