*) fix GET handling: cache the provider; test through the provider rather

   than the handle_get config member (which is now gone)

*) use "DAV/2" for the server token rather than dup'ing the apache vsn


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86499 13f79535-47bb-0310-9956-ffa450edef68