Checking out the CSRG repository?

Does anybody know how to check out a local copy of the CSRG
repository?  I can view it with ViewVC, but I would really like local
access.  It doesn't seem to be available on the usual repo.FreeBSD.org
or svn.FreeBSD.org.

$ svn checkout https://svn.FreeBSD.org/csrg csrg
svn: E170013: Unable to connect to a repository at URL
'https://svn.freebsd.org/csrg'
svn: E175009: The XML response contains invalid XML
svn: E130003: Malformed XML: no element found at line 1

$ svn co svn+ssh://asomers_at_repo.freebsd.org/csrg csrg
svn: E170013: Unable to connect to a repository at URL
'svn+ssh://asomers_at_repo.freebsd.org/csrg'
svn: E210005: No repository found in 'svn+ssh://asomers_at_repo.freebsd.org/csrg'

-Alan