[PATCH 0/2] MR1846: Fix CUI output on Unix tty.

[eric pouech (＠epo)]

While testing some Windows CUI app (hiew.exe from bug #54141), it appears
that some console API allow to write all the possible control characters
onto the console.
This serie:
- add tests for read/write test of these
- fix 'unix' console to not send some of the control characters to the
  underlying tty, which would reinterpret them. This leads to unwanted
  display (ie hexdump of a file would insert real cr/lf when displaying
  dump of \r\n")