Apache2 http_proxy, tomcat och Vaadin

<VirtualHost *:80>
        ServerName dkp.unknown-entity.com
        RewriteEngine On
        RewriteRule ^/(.*) http://127.0.0.1:4848/$1 [L,P]
        ProxyPassReverse / http://127.0.0.1:4848/dkp-1.0/
</VirtualHost>

<Connector port="4848" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" proxyPort="80" proxyServer="dkp.unknown-entity.com"/>
...
 <Host name="dkp.unknown-entity.com" appBase="webapps">
              <Context path="" docBase="" debug="1"/>
          </Host>

    <servlet-mapping>
        <servlet-name>Vaadin Application Servlet</servlet-name>
        <url-pattern>/dkp-1.0/*</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>Vaadin Application Servlet</servlet-name>
        <url-pattern>/VAADIN/*</url-pattern>
    </servlet-mapping>