Lighttpd

Where "foo.cgi" is a CGI script, the following:

...results in the contents of foo.cgi (rather than its output) being shown - which more or less makes "include virtual" just a %-encoded version of "include file".

I'm aware that this kind of recursive behaviour is a nightmare to ask for, but it does seem very much that the reason for the existence of "include virtual" is for precisely this (recursive request) kind of thing.