Add operational logging to mod_dav_svn's implementation of replay.
Add operational logging to mod_dav_svn's implementation of replay.

* subversion/mod_dav_svn/replay.c
  (dav_svn__replay_report): Set up the SVN-ACTION env var so we show up
   in operational logging.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion