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.
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 integration plug-in.
For more information on these plug-ins, see Sun Java System Web Server 7.0 Update 3 Administrator’s Guide.