Server Side Includes (SSIs) are allowed, but require the calling
page to have the extension .shtml instead of .html. Typical syntax
for includes would look like:
<!--#include virtual="includes/includedpage.html"
-->.
Here the section "includes/includedpage.html" identifies
the path to the page to be included. If it is in the same directory,
just use the file name, otherwise provide a path to the file (eg.
the "includes" directory listed above.
Note that the <!--#exec ...--> command is not allowed for
security reasons. Nonetheless, you may use CGI scripts as an alternative
if you need to generate dynamically executable pages.
