Fix: UTF8 support for LDAP module

htdocs/adherents/adherent.class.php

htdocs/adherents/fiche.php

htdocs/admin/ldap_contacts.php

htdocs/admin/ldap_groups.php

htdocs/admin/ldap_members.php

htdocs/admin/ldap_users.php

htdocs/conf/conf.class.php

htdocs/langs/en_US/errors.lang

htdocs/langs/fr_FR/errors.lang

htdocs/lib/admin.lib.php

htdocs/lib/functions.lib.php

htdocs/lib/ldap.class.php

htdocs/lib/ldap.lib.php

htdocs/translate.class.php