This CVS repository is no more used. We switched to Subversion.
Grab the new repository here:

Anonymous checkout:
svn co svn://svn.debian.org/ddp/developers-reference/trunk

Authenticated checkout for DDP members:
svn co svn+ssh://svn.debian.org/svn/ddp/developers-reference/trunk

Browse the new repo on the web:
http://svn.debian.org/wsvn/ddp/developers-reference/trunk/

-- Raphael Hertzog