wordpress: Fix PHP error log noise from internal files

Avoid noise in PHP error logs from bots crawling WP internals

> Uncaught Error: Call to undefined function __()
> in /srv/wordpress/sites/jquery_com/wp-admin/includes/file.php

https://core.trac.wordpress.org/ticket/9185

Author: Krinkle

modules/profile/manifests/wordpress/docs.pp

@@ -137,7 +137,7 @@
 
       file { "${dir}/wp-content/object-cache.php":
         ensure  => file,
-        source  => "file:///srv/wordpress/jquery-wp-content/plugins/memcached/object-cache.php",
+        source  => 'file:///srv/wordpress/jquery-wp-content/plugins/memcached/object-cache.php',
         require => [
           Exec["wp-download-${name}"],
           Package['memcached']

modules/wordpress/templates/site/site.nginx.erb

@@ -22,6 +22,21 @@ server {
     deny all;
   }
 
+  # Avoid noise in PHP error logs from bots accessing includes
+  #
+  # > Uncaught Error: Call to undefined function __()
+  # > in /srv/wordpress/sites/jquery_com/wp-admin/includes/file.php
+  #
+  # https://core.trac.wordpress.org/ticket/9185
+  location ^~ /wp-includes/(.*).php {
+    access_log off;
+    deny all;
+  }
+  location ^~ /wp-admin/includes/ {
+    access_log off;
+    deny all;
+  }
+
   include /etc/nginx/wordpress-subsites/<%= @host %>.d/*.conf;
 
 <%- if @gilded_wordpress -%>