# Prevent Apache from serving .htaccess files:
<FilesMatch "^\.htaccess">
    Order allow,deny
    Deny from all
</FilesMatch>

# Add www to any URLs that do not have them:
RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

User-agent: *
Disallow:
Crawl-Delay: 20