keep german version in sync

(Note: upgrading.xml.de is not up-to-date in both branches)
(Note2: in Head also the original should be updated to 2.1 anyway)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97776 13f79535-47bb-0310-9956-ffa450edef68