UrlRewriter rewrite_url doubles ports

if i change the :port => new_port within an url_for( :only_path => false ...) an url like 'http://foo.bar.com:port_old:port_new will be created if the current request uses non std. ports.

The fix is simple though:

change Line 180:

      rewritten_url << (options[:host] || @request.host_with_port)

to:

      rewritten_url << (options[:host] || (options.key?(:port) ? @request.host : @request.host_with_port))