Mark svn_fs_move as experimental since we don't use it yet and might
need to change it until we do.

* subversion/include/svn_fs.h
  (svn_fs_move): mark as experimental

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1526013 13f79535-47bb-0310-9956-ffa450edef68
Fix a few incomplete condition that did not handle all new move types.

* subversion/libsvn_fs_fs/transaction.c
  (fold_change): Fix a add / move asymmetry
  (write_final_changed_path_info): check for all types of moves

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1526014 13f79535-47bb-0310-9956-ffa450edef68