* subversion/libsvn_ra_serf/update.c
  (update_opened,
   update_closed): Following up on r1582023, and r1582047 add comments
     explaining the reason this code is here.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1582274 13f79535-47bb-0310-9956-ffa450edef68