anchor.diff:      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/
  
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://sagemath.org/src-old/
    ];
  
    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)
    ];
  }
  