nsapi_virtual() is an NSAPI-specific function which
is equivalent to <!--#include virtual...--> in SSI
.shtml files). It does an NSAPI sub-request.
It is useful for including CGI scripts or .shtml files, or anything
else that you'd parse through webserver.
To run the sub-request, all buffers are terminated and flushed to the browser, pending headers are sent too.
This function depends on a undocumented feature of the Netscape/iPlanet/Sun
webservers. Use phpinfo() to determine if it is available.
In the Unix environment it should always work, in Windows it depends on the name of