update Kloxo-MR 7.0.0.b to 2014091704 (add mysql in services list; create lxadmin dir in fixmail-all if not exists; mod fixrepo; add set-fs (increase open files limit in sysctl and limit); add set-hosts (add declare hostname in /etc/hosts); fix install process (especially for update from lower version); disable 'yum clean all' in install process (make faster); fix set-hosts script (issue related to CentOS 6))