Fix issue #3133, don't contact server during WC->WC moves and copies.
Fix issue #3133, don't contact server during WC->WC moves and copies.

* subversion/libsvn_client/copy.c
  (calculate_target_mergeinfo): Doc string tweak noting that ra_session 
  can be NULL if we are not contacting the repos.
  (propagate_mergeinfo_within_wc): Don't open an RA session!  This function
  is strictly a helper for WC->WC copies and moves (the removed bit of code
  dates back to when we *did* contact the server in these cases).  Also
  tweak the doc string to remove mention of non-existent 
  with_merge_history argument.

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