Users can associate changes they commit in the repository with specific IDs corresponding to issues existing in their bug
tracking systems. When committing changes, you can specify a bug ID for the changeset,
linking the committed revision with the issue entry maintained by the bug tracking system.
The format of the bug ID in the commit message and the location of the issue in the bug
tracking system are configured with SVN properties like: bugtraq:url,
bugtraq:number, bugtraq:append,
bugtraq:logregex.