translation update

inc/lang/zh/lang.php

inc/lang/zh/stopwords.txt

inc/lang/zh/subscr_digest.txt

inc/lang/zh/subscr_list.txt

inc/lang/zh/subscr_single.txt

lib/plugins/authad/lang/zh/lang.php

lib/plugins/authldap/lang/zh/settings.php

lib/plugins/config/lang/zh/intro.txt

lib/plugins/config/lang/zh/lang.php

lib/plugins/extension/lang/zh/intro_search.txt

lib/plugins/extension/lang/zh/intro_templates.txt

lib/plugins/extension/lang/zh/lang.php

lib/plugins/popularity/lang/zh/lang.php

lib/tpl/dokuwiki/lang/zh/style.txt