Last API layer to update: bump svn_client_log.
Simply pass an extra move_behavior option to the next layer

* subversion/include/svn_client.h
  (svn_client_log6): declare bumped API
  (svn_client_log5): deprecate

* subversion/libsvn_client/deprecated.c
  (svn_client_log5): implement in terms of svn_client_log6

* subversion/libsvn_client/log.c
  (run_ra_get_log): pass the extra paramter through
  (svn_client_log6): ditto; replaces ...
  (svn_client_log5): ... this one

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1525463 13f79535-47bb-0310-9956-ffa450edef68