Changelogic web interface does not interact with VCS server directly, thus the registry only logical, meant to make your life easier when configuring project and linking to ViewVC. The real connection to VCS server is made in Changelogic client, based on the CVSROOT variable you provide, as explained in command line client configuration.
The only thing Changelogic web interface does is directing your browser to ViewVC when browsing changed files. Additionally, when browsing changed files from version differences, the so called “diff service” is needed, because Changelogic does not keep revision history for each file. But there is now direct interaction too, only your browser is being directed from Changelogic web to diff service and from diff service to correct page in ViewVC.
List of VCS servers (user menu -> VCS servers) displays VCS servers in Changelogic and allows you to filter servers by various criteria.
On VCS server details view, you can see detailed data of VCS server. If you have VCS server administrating privilege, you can change its data. “Link to web” is needed to view changed files in change and version diff. Because we do not know revision numbers when getting version diff, we need diff service to do that.
You can add new VCS server on VCS server list page by using link “New VCS server”