Mine

<IfModule mod_proxy.c>
        ProxyPass /svn http://svn.my-domain.com
        ProxyPassReverse  /svn http://svn.my-domain.com
        ProxyErrorOverride On
        <Location /svn/>
        Dav on
        <Limit OPTIONS PROPFIND GET REPORT MKACTIVITY PROPPATCH PUT CHECKOUT MKCOL MOVE COPY DELETE LOCK UNLOCK MERGE>
          Order Deny,Allow
          Allow from all
          Satisfy Any
        </Limit>
</Location>
</IfModule>