[TASK] htaccess: Generate direct access protection

When the root .htaccess invokes the RewriteRule to typo3temp/tx_ncstaticfilecache/
apache performs an internal redirect where the root .htaccess is ignored since the subdirectory
includes an .htaccess file that includes an own set of RewriteRules.
Prevent direct access by including the access check in all .htaccess files.

Author: bnf

Resources/Private/Templates/Htaccess.html

@@ -7,6 +7,14 @@
 <f:if condition="{sendCacheControlHeaderRedirectAfterCacheTimeout}">
 <IfModule mod_rewrite.c>
 	RewriteEngine On
+
+	<f:comment>
+		Explicitly prevent direct access here. This is needed because the .htaccess
+		access check in the root dir is overwritten by the RewriteRules defined here.
+	</f:comment>
+	RewriteCond %{ENV:REDIRECT_STATUS} ^$
+	RewriteRule .* - [F,L]
+
 	RewriteCond %<![CDATA[{TIME}]]> ><f:format.date format="YmdHis">@{expires}</f:format.date>
 	RewriteRule ^.*$ /index.php
 </IfModule>