anchor.diff:      "https://www.imagemagick.org/download/"
       "https://mirror.checkdomain.de/imagemagick/"
       "https://ftp.nluug.nl/ImageMagick/"
  +    "https://ftp.sunet.se/mirror/imagemagick.org/ftp/"
       "ftp://ftp.sunet.se/mirror/imagemagick.org/ftp/" # also contains older versions removed from most mirrors
  -    "https://ftp.sunet.se/mirror/imagemagick.org/ftp/"
     ];
   
     # CPAN mirrors.
  
positive.code:   apache = [
      "https://www-eu.apache.org/dist/"
      "https://ftp.wayne.edu/apache/"
      "http://ftp.tudelft.nl/apache/"
      "https://www.apache.org/dist/"
      "https://archive.apache.org/dist/" # fallback for old releases
      "ftp://ftp.funet.fi/pub/mirrors/apache.org/"
      "https://apache.cs.uu.nl/"
      "https://apache.cs.utah.edu/"
    ];
  
    postgresql = [
  
negative.code:   # GnuPG.
    gnupg = [
      "https://gnupg.org/ftp/gcrypt/"
      "https://mirrors.dotsrc.org/gcrypt/"
      "https://ftp.heanet.ie/mirrors/ftp.gnupg.org/gcrypt/"
      "https://www.mirrorservice.org/sites/ftp.gnupg.org/gcrypt/"
      "http://www.ring.gr.jp/pub/net/"
    ];
  
    # kernel.org's /pub (/pub/{linux,software}) tree.
  