anchor.diff:    
     # SourceForge.
     sourceforge = [
  +    http://prdownloads.sourceforge.net/
       http://heanet.dl.sourceforge.net/sourceforge/
       http://surfnet.dl.sourceforge.net/sourceforge/
       http://dfn.dl.sourceforge.net/sourceforge/
  
positive.code: 
    # Mirrors of ftp://ftp.kde.org/pub/kde/.
    kde = [
      http://ftp.gwdg.de/pub/x11/kde/
      ftp://ftp.heanet.ie/mirrors/ftp.kde.org/
      ftp://ftp.kde.org/pub/kde/
  
negative.code:     http://ovh.dl.sourceforge.net/sourceforge/
      http://osdn.dl.sourceforge.net/sourceforge/
      http://kent.dl.sourceforge.net/sourceforge/
    ];
  
    sf = sourceforge;
  