#    Mod_security can interfere with uploading of content such as attachments. If you #    cannot attach files, remove the "#" from the lines below. #<IfModule mod_security.c> #    SecFilterEngine Off #    SecFilterScanPOST Off #</IfModule>   ErrorDocument 401 default ErrorDocument 403 default ErrorDocument 404 default ErrorDocument 500 default   <IfModule mod_rewrite.c>     RewriteEngine On       #    If you are having problems with the rewrite rules, remove the "#" from the     #    line that begins "RewriteBase" below. You will also have to change the path     #    of the rewrite to reflect the path to your XenForo installation.     #RewriteBase /xenforo       #    This line may be needed to enable WebDAV editing with PHP as a CGI.     #RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]       RewriteCond %{REQUEST_FILENAME} -f [OR]     RewriteCond %{REQUEST_FILENAME} -l [OR]     RewriteCond %{REQUEST_FILENAME} -d     RewriteRule ^.*$ - [NC,L]     RewriteRule ^(data/|js/|styles/|install/|favicon\.ico|crossdomain\.xml|robots\.txt) - [NC,L]     RewriteRule ^.*$ index.php [NC,L] </IfModule>