Make --auto-moves option affective on legacy repositories (BDB) as well.
Since these don't return copy-from information, we can't do match the
DEL / ADD matching directly in libsvn_fs.

Instead, we move the functionality one level up to libsvn_repos.  The
logic is the same despite using yet another path change type.  Revert
to v1.6 FS API and update callers.

* subversion/include/svn_fs.h
  (svn_fs_paths_changed3): dropp
  (svn_fs_paths_changed2): re-instantiate as "current"

* subversion/libsvn_fs/fs-loader.c
  (is_deletion,
   turn_moves_into_copies,
   turn_unique_copies_into_moves): remove here
  (svn_fs_paths_changed3): drop
  (svn_fs_paths_changed2): call vtable entry directly again
  (svn_fs_paths_changed): update

* subversion/libsvn_repos/log.c
  (svn_repos_check_revision_access): revert FS API caller
  (is_deletion,
   turn_moves_into_copies,
   turn_unique_copies_into_moves): moved here; use repos layer change type
  (detect_changed): revert FS API caller; call move conversion functions here
  (fs_mergeinfo_changed,
   get_combined_mergeinfo_changes): drop move_behavior parameter again
  (do_logs): update caller

* subversion/mod_dav_svn/merge.c
  (do_resources): drop move_behavior parameter again
  (dav_svn__merge_response): update caller

* tools/server-side/svn-populate-node-origins-index.c
  (index_revision_adds): revert FS API caller

* tools/server-side/svn-rep-sharing-stats.c
  (process_one_revision): ditto

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1535330 13f79535-47bb-0310-9956-ffa450edef68