[change][G.Rousse, INRIA][patch sympa-trunk-3-correct-autoconf-prolog-and-epilog.patch] Use the standard autoconf method to declare the software version, instead of using the .version file


git-svn-id: https://subversion.renater.fr/sympa/trunk@4950 05aa8bb8-cd2b-0410-b1d7-8918dfa770ce