Revert "Finalement, j'ai corrigé la faille dans join_main"

This reverts commit a32d36615459e53230752d4e902bfcad740327dc.
Revert "nouveau test"

This reverts commit ba12cddac21939c9e8a167b42fd515545529b016.

Conflicts:

	trunk/CMakeLists.txt
Merge branch 'master' into semaphore
Suppression du test avec les mutex de la branche master
Merge branch 'master' into semaphore

Conflicts:
	trunk/test/71-summ-thread.c