On the log-addressing branch:  Make FSFS hotcopy handle logically
addressed shards.  The key here is to simply copy / clean up the
index files whenever we do the same to a rev / pack file.

* subversion/libsvn_fs_fs/hotcopy.c
  (hotcopy_copy_shard_file): copy indexes as well if quested by
                             the caller
  (hotcopy_copy_packed_shard): revprops don't have index files
  (hotcopy_remove_file): factor out utility from hotcopy_remove_files
  (hotcopy_remove_files): clean up index files upon request
  (hotcopy_remove_rev_files,
   hotcopy_remove_revprop_files,
   hotcopy_body): update callers

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/log-addressing@1512338 13f79535-47bb-0310-9956-ffa450edef68