anchor.diff:  
     # OpenBSD mirrors
     openbsd = [
  +    http://openbsd.mirrors.pair.com/
       http://ftp.openbsd.org/pub/OpenBSD/
  -    ftp://ftp.nluug.nl/pub/OpenBSD/
  -    ftp://ftp-stud.fht-esslingen.de/pub/OpenBSD/
  -    ftp://ftp.halifax.rwth-aachen.de/pub/OpenBSD/
  -    ftp://mirror.switch.ch/pub/OpenBSD/
     ];
   }
  
positive.code:   # Mirrors for mirror://site/filename URIs, where "site" is
    # "sourceforge", "gnu", etc.
  
    # SourceForge.
    sourceforge = [
      http://prdownloads.sourceforge.net/
      http://heanet.dl.sourceforge.net/sourceforge/
  
negative.code:     ftp://ftp.gmd.de/ftp.suse.com-discontinued/
    ];
  
    # openSUSE
    opensuse = [
      http://opensuse.temple.edu/distribution/
      http://ftp.opensuse.org/pub/opensuse/distribution/
    ];
  
    # Gnome
    gnome = [
      http://gnome.mirrors.pair.com/
      # This one redirects to some mirror closeby, so it should be all you need.
      http://download.gnome.org/
    ];
  
    xfce = [
      http://archive.xfce.org/
    ];
  
    # X.Org
    xorg = [
      http://xorg.mirrors.pair.com/
      http://xorg.freedesktop.org/releases/
      http://ftp.x.org/pub/ # often incomplete (e.g. files missing from X.org 7.4)
    ];
  
    # Apache
    apache = [
      http://apache.mirrors.pair.com/
      http://www.apache.org/dist/
      http://archive.apache.org/dist/ # fallback for old releases
    ];
  
    postgresql = [
  