[change][G.Rousse, INRIA][patch sympa-trunk-7-dont-search-for-shell.patch] : POSIX defines that /bin/sh is available on every OS, therefore it does not need to be defined via a variable


git-svn-id: https://subversion.renater.fr/sympa/trunk@4976 05aa8bb8-cd2b-0410-b1d7-8918dfa770ce