[coreutils] FYI, the repo is once again read-only

[Jim Meyering]

The first SQL injection abuse was actually two days earlier,
so we're reverting to Nov 22 backups instead.
There's a brief note on http://savannah.gnu.org/:

    # 2010/11/30 22:45 GMT: stopped write access and preparing new
      backup from the 22th

    # 2010/11/30 23:45 GMT: found trace of earlier read-only SQL
      injections as back as January, but apparently none with actual
      account cracking; searching more

    # 2010/12/01 00:55 GMT: after fishing through logs, it appears that
      there was no other account cracking