[PATCH 0 of 1] Alternative debug-shell implementation

["Yann E. MORIN" <yann dot morin dot 1998 at free dot fr>]

Johannes, All,

Here is an alternate implementation of debug-shell, that I was working on
following your previous submission.

I prefer it over yours (even the revised one), becasue:
  - it does not duplicate CT_DoExecLog
  - it is integrated in the fault handler
  - it messes up with the trap, but in the fault handler, not
    in the normal code path
  
It's still not finished ( needs eg.: s/bash/${bash}/ ), and I did not yet
fully tested it, but it seems all is fitted in place.

I was working on it, since you said "I'm out of time atm and can't finish it."
Of course, your initial submission was of great help to come up with this
alternate solution! Thank you! :-)

Regards,
Yann E. MORIN.

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