Adds and the default conference. part where the muc module live in default deployments.

This reverts commit e2e04e3f16.

Queries room for their size or room particiapnt's information. Depends on luarocks net-url module.

The script looks for nginx, apache2 or jetty configuration and edits the first one found. Nginx and apache2 will be reloaded, while jvb will be stopped, configured and started again.