minor #14509 Add DirectoryIndex to fallback for resources (wimme002)

This PR was submitted for the 5.x branch but it was merged into the 4.4 branch instead.

Discussion
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Add DirectoryIndex to fallback for resources

When `DirectoryIndex` is set `FallbackResource disabled` will do nothing because apache falls back to `DirectoryIndex`.

Commits
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2b1f063 Add DirectoryIndex to fallback for resources

Author: javiereguiluz

setup/web_server_configuration.rst

@@ -127,6 +127,7 @@ and increase web server performance:
         # which will allow Apache to return a 404 error when files are
         # not found instead of passing the request to Symfony
         <Directory /var/www/project/public/bundles>
+            DirectoryIndex disabled
             FallbackResource disabled
         </Directory>
         ErrorLog /var/log/apache2/project_error.log