Page is a not externally linkable
bird - 9:27 am on Nov 5, 2006 (gmt 0)
The first line is needed for very old browsers (or robots) who don't support virtual hosting, so they won't cause infinite redirects.
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST} !^www\.example\.com
RewriteRule ^(.*)$ http://www.example.com/$1 [R=301,L]