Apache2: Redirection http et renommage à la volée

Sur apache2, sans la section virtualhost:
Redirection http:
Solution 1:

       RewriteEngine On
     RewriteRule ^(/.*)$ http://www.monsite.com$1 [R]

Solution 2:

       RedirectMatch (.*)$ http://www.monsite.com$1

Solution 3:

       Redirect / http://www.monsite.com/

Renommage a la volée:

Pour un site sur port 80:

       RewriteEngine On
     RewriteCond %{HTTP_HOST}   !^www\.monsite\.com [NC]
     RewriteCond %{HTTP_HOST}   !^$
     RewriteRule ^/(.*)         http://www.monsite.com/$1 [L,R=301]

Pour un site sur un autre port que le 80:

       RewriteEngine On
     RewriteCond %{HTTP_HOST}   !^www\.monsite\.com [NC]
     RewriteCond %{HTTP_HOST}   !^$
     RewriteCond %{SERVER_PORT} !^80$
     RewriteRule ^/(.*)         https://www.monsite.com:%{SERVER_PORT}/$1 [L,R]

Sources d'aide:
http://httpd.apache.org/docs/1.3/misc/rewriteguide.html
http://www.html.com/forums/apache-web-server/12655-canonical-hostnames-apache2-htaccess.html