[PATCH 0/5] MR8882: Cmd engine rewrite (part XXXIV)

[eric pouech (＠epo)]

This MR mainly refactors the large wmain() into dedicated helpers.

- reusing existing exec/batch file/command discrimination helpers
  (cmd /C or cmd /K does behave as any other execution clause),
- enabling ctrl-C handling when executing cmd /C or cmd /K (as
  native does).