anchor.diff:      http://sagemath.org/src-old/
     ];
   
  -  # MySQL mirrors
  -  mysql = [
  -    http://mysql.mirrors.pair.com/Downloads/
  -    http://cdn.mysql.com/Downloads/
  -  ];
  -
  -  # OpenBSD mirrors
  -  openbsd = [
  -    http://openbsd.mirrors.pair.com/
  -    http://ftp.openbsd.org/pub/OpenBSD/
  +  samba = [
  +    https://samba.org/ftp/
  +  ];
  +
  +  savannah = [
  +    http://gnu.mirrors.pair.com/savannah/savannah/
  +    http://download.savannah.gnu.org/releases/
  +  ];
  +
  +  # SourceForge
  +  sourceforge = [
  +    http://prdownloads.sourceforge.net/
  +    http://heanet.dl.sourceforge.net/sourceforge/
  +    http://surfnet.dl.sourceforge.net/sourceforge/
  +    http://dfn.dl.sourceforge.net/sourceforge/
  +    http://osdn.dl.sourceforge.net/sourceforge/
  +    http://kent.dl.sourceforge.net/sourceforge/
  +  ];
  +
  +  # SourceForge.jp
  +  sourceforgejp = [
  +    http://osdn.dl.sourceforge.jp/
  +    http://jaist.dl.sourceforge.jp/
  +  ];
  +
  +  # Ubuntu
  +  ubuntu = [
  +    http://ubuntu.mirrors.pair.com/
  +    http://archive.ubuntu.com/ubuntu/
  +    http://old-releases.ubuntu.com/ubuntu/
  +  ];
  +
  +  xfce = [
  +    http://archive.xfce.org/
  +  ];
  +
  +  # X.Org
  +  xorg = [
  +    http://xorg.mirrors.pair.com/
  +    http://mirror.us.leaseweb.net/xorg/
  +    http://xorg.freedesktop.org/releases/
  +    http://ftp.x.org/pub/ # often incomplete (e.g. files missing from X.org 7.4)
     ];
   }
  
positive.code:     http://cran.mtu.edu/
    ];
  
    # Hackage mirrors
    hackage = [
      http://hackage.haskell.org/package/
      http://hdiff.luite.com/packages/archive/package/
    ];
  
    # Roy marples mirrors
  
negative.code:     http://mirrors.ustc.edu.cn/bioc/3.2/bioc/
    ];
  
    # BitlBee mirrors, see http://www.bitlbee.org/main.php/mirrors.html
    bitlbee = [
      http://get.us.bitlbee.org/
      http://get.bitlbee.org/
    ];
  
    chromium = [
      https://commondatastorage.googleapis.com/chromium-browser-official/
      https://gsdview.appspot.com/chromium-browser-official/
    ];
  
    # CPAN
    cpan = [
      http://mirrors.kernel.org/CPAN/
      http://cpan.pair.com/pub/CPAN
      http://cpan.perl.org/
      http://backpan.perl.org/  # for old releases
    ];
  
    # CRAN mirrors (from http://cran.r-project.org/mirrors.html)
    cran = [
      http://watson.nci.nih.gov/cran_mirror/
  