cvsbug is a tool used to submit problem reports (PRs) to a central support site. In most cases the correct site will be the default. This argument indicates the support site which is responsible for the category of problem involved. Some sites may use a local address as a default. site values are defined by using the aliases(5).
cvsbug invokes an editor on a problem report template (after trying to fill in some fields with reasonable default values). When you exit the editor, cvsbug sends the completed form to the Problem Report Management System (GNATS) at a central support site. At the support site, the PR is assigned a unique number and is stored in the GNATS database according to its category and submitter-id. GNATS automatically replies with an acknowledgement, citing the category and the PR number.
To ensure that a PR is handled promptly, it should contain your (unique) submitter-id and one of the available categories to identify the problem area. (Use cvsbug -L to see a list of categories.)
The cvsbug template at your site should already be customized with your submitter-id (running install-sid submitter-id to accomplish this is part of the installation procedures for cvsbug). If this hasnt been done, see your system administrator for your submitter-id, or request one from your support site by invoking cvsbug --request-id. If your site does not distinguish between different user sites, or if you are not affiliated with the support site, use net for this field.
The more precise your problem description and the more complete your information, the faster your support team can solve your problems.