Apache:CommandLineFu
From Zoelife4U Wiki
Available Directives for HtAccess
Here’s how to find the directives available in the core of apache httpd that you can use in your .htaccess file. You can find out what your httpd allows if you can access the httpd binary from a shell by typing the following command from a shell. Root access is required for this...
httpd -L | grep -B 2 "htaccess" | grep -v '-'