The plugins directory contains the plug-in subdirectories. .
digest contains the digest authentication plug-in for Sun Java Directory
Server, as well as information about the plug-in.
fastcgi contains the files for the FastCGI plug-in.
htaccess contains server plug-in for .htaccess access
control and htconvert, which is an .nsconfig to .htaccess converter.
loadbal contains the required files for the third–party load-balancer
For more information on these plug-ins, see Sun Java System Web Server 7.0 Update 4 Administrator’s Guide.