I want to link to an external site via mysite.com/demo - the problem with the 301 redirect solutions I have seen is that they go to the new url. I would like the url to remaIn mysite.com/demo. It was suggested that I drop a .htaccess file with some proxy settings into /demo, but I can't see how I would do that with Processwire. Any ideas?
PS. I know that I can do this with a subdomain and changing the A record, but I have an existing ssl cert that needs to be used on the main domain.