Remove module blacklist

- It's not necessary, as SilverStripe returns a not-found page when an
  attempt is made to retrieve a file directly from a module.
- Also format as a fenced code block and style as nginx.

docs/en/00_Getting_Started/01_Installation/How_To/Configure_Nginx.md

@@ -18,7 +18,8 @@ Especially be aware of [accidental php-execution](https://nealpoole.com/blog/201
 
 But enough of the disclaimer, on to the actual configuration — typically in `nginx.conf`:
 
-	server {
+```nginx
+server {
   include mime.types;
   default_type  application/octet-stream;
   client_max_body_size 0; # Manage this in php.ini
@@ -54,17 +55,7 @@ But enough of the disclaimer, on to the actual configuration — typically in `n
     include        fastcgi_params;
   }
 
-		# Core denial (change mysite if you use a different name)
-        location ~ /(mysite|framework|cms)/.*\.(php|php3|php4|php5|phtml|inc)$ {
-            deny all;
-        }
-
-        # Modules denial (edit the regex to match your installed modules)
-        location ~ /(buildtools|colorpicker|docsviewer|editlock|geoip|googlesitemaps|mathspamprotection|sortablegridfield|spamprotection|testsession|userforms)/.*\.(php|php3|php4|php5|phtml|inc)$ {
-            deny all;
-        }
-		
-        # Other denials
+  # Denials
   location ~ /\.. {
       deny all;
   }
@@ -94,7 +85,8 @@ But enough of the disclaimer, on to the actual configuration — typically in `n
   location ~* /(cms|framework)/silverstripe_version$ {
       deny all;
   }
-    }
+}
+```
 
 The above configuration sets up a virtual host `example.com` with
 rewrite rules suited for SilverStripe. The location block for framework