<!-- 404 -->
<Files ~ "^.(htaccess|htpasswd)$">
deny from all
</Files>
ErrorDocument 404 /404.html
order deny,allow
<!-- 503 -->
<Files ~ "^.(htaccess|htpasswd)$">
deny from all
</Files>
ErrorDocument 503 /503.html
order deny,allow
<!-- 404,503同时 -->
<Files ~ "^.(htaccess|htpasswd)$">
deny from all
</Files>
ErrorDocument 404 /404.html
ErrorDocument 503 /503.html
order deny,allow