Change the test of Mod Perl version for logout_app rules, to be compliant with...

Change the test of Mod Perl version for logout_app rules, to be compliant with Manager CGI mode and recent Safe.pm version (#LEMONLDAP-266)

git-svn-id: svn://svn.forge.objectweb.org/svnroot/lemonldap/branches/lemonldap-ng_version_1_0-bugfixes@1947 1dbb9719-a921-0410-b57f-c3a383c2c641