Credit: https://www.w3.org/WAI/WCAG21/Techniques/#server-side-script
- SVR1: Implementing automatic redirects on the server side instead of on the client side
- SVR2: Using .htaccess to ensure that the only way to access non-conforming content is from conforming content
- SVR3: Using HTTP referer to ensure that the only way to access non-conforming content is from conforming content
- SVR4: Allowing users to provide preferences for the display of conforming alternate versions
- SVR5: Specifying the default language in the HTTP header