Specifies that you want to configure the HTTP server, so it will ask you for the administrator user id and password, then assume that any local connection (the browser must on the same computer as the HTTP server) that connects though a http://localhost/ URL is connecting as the administrator to the Pliant documentation site which is also the HTTP server configuration site.
This is very important since it enables you to connect to the HTTP server even if it's not fully configured yet, or the configuration is broken, and to setup the HTTP server using the browser through selecting the 'Configuring Pliant services' link.

An example:

pliant module /pliant/protocol/http/server.pli command 'http_server configure'