Do not rewrite letsencrypt .well-known URI

.htaccess

@@ -65,6 +65,7 @@
   RewriteCond %{REQUEST_FILENAME} !/status.php
   RewriteCond %{REQUEST_FILENAME} !/ocs/v1.php
   RewriteCond %{REQUEST_FILENAME} !/ocs/v2.php
+  RewriteCond %{REQUEST_URI} !^/.well-known/acme-challenge/.*
   RewriteRule .* index.php [PT,E=PATH_INFO:$1]
 </IfModule>
 <IfModule mod_mime.c>