wilderness - 6:25 pm on Jan 15, 2013 (gmt 0)

This is about as basic as you get, unfortunately it does not provide any type of protection (at least in its current state):

<Files "robots.txt">
Order Allow,Deny
Allow from all
</Files>
<Limit GET PUT HEAD>
Order Deny,Allow
Allow from all
Deny from env=keep_out
</Limit>
RewriteEngine On
# redirect no-www to www.
RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [R=301,L]