anchor.diff:  @echo off
   REM     https://cmake.org/files/v3.9/cmake-3.9.6-win64-x64.zip -> cmake
  -REM     http://sourceforge.net/projects/gnuwin32/files//sed/4.2.1/sed-4.2.1-bin.zip/download -> sed
  -REM     http://sourceforge.net/projects/gnuwin32/files//sed/4.2.1/sed-4.2.1-dep.zip/download -> sed
  -REM     http://files.transmissionzero.co.uk/software/development/GLUT/freeglut-MSVC.zip -> freeglut
  +REM     https://sourceforge.net/projects/gnuwin32/files/sed/4.2.1/sed-4.2.1-bin.zip/download -> sed
  +REM     https://sourceforge.net/projects/gnuwin32/files/sed/4.2.1/sed-4.2.1-dep.zip/download -> sed
  +REM     https://files.transmissionzero.co.uk/software/development/GLUT/freeglut-MSVC-3.0.0-2.mp.zip -> freeglut
   
   set EXT=%~dp0external
   
  
positive.code: 
  REM ------------------ sed-dep
  
  set SRC=http://sourceforge.net/projects/gnuwin32/files//sed/4.2.1/sed-4.2.1-dep.zip/download
  set ZIP=%EXT%\sed-4.2.1-dep.zip
  set DST=%EXT%\sed
  
  
negative.code: 
  REM ------------------ sed
  
  set SRC=https://sourceforge.net/projects/gnuwin32/files/sed/4.2.1/sed-4.2.1-bin.zip/download
  set ZIP=%EXT%\sed-4.2.1-bin.zip
  set DST=%EXT%\sed
  
  