[R] rsync.r-project.org available again

[Douglas Bates]

The rsync site is back up.  It may take a while for the new location
to percolate through the DNS servers.  The site should be

bates at bates4:~$ host rsync.r-project.org
rsync.r-project.org is an alias for bates4.stat.wisc.edu.
bates4.stat.wisc.edu has address 128.105.174.134

and not the previous site, franz.stat.wisc.edu, which was comprised.