improve modularity of search engine


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@22793 35612d4c-9d10-0410-837c-bf9dd1be60d7
typo


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@22794 35612d4c-9d10-0410-837c-bf9dd1be60d7