That's for CGI scripts, I'm trying to do Server Side Includes (SSI).
I did try the following after reading the Apache2 documentation on www.apache.org:
# added for Server Side includes (SSI) in htdocs
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
# added for perl cgi scripts
AddHandler cgi-script .cgi
The second part works; my .cgi scripts run, but the
SSI scripts (.shtml) don't. It may be because I'm trying
to run them locally (localhost).