On the fsfs-format7 branch:  Instead of using a set of flags,
use a single enum value to determine the type / format of a
representation.  Update all users.

* subversion/libsvn_fs_fs/low_level.h
  (svn_fs_fs__rep_type_t): declare new private API type
  (svn_fs_fs__rep_header_t): use that instead of boolean flags

* subversion/libsvn_fs_fs/low_level.c
  (svn_fs_fs__read_rep_header,
   svn_fs_fs__write_rep_header): update parsers and writers

* subversion/libsvn_fs_fs/cached_data.c
  (dgb__log_access,
   create_rep_state_body,
   svn_fs_fs__rep_chain_length,
   build_rep_list,
   svn_fs_fs__get_file_delta_stream,
   block_read_windows): update users

* subversion/libsvn_fs_fs/pack.c
  (copy_rep_to_temp): ditto

* subversion/libsvn_fs_fs/recovery.c
  (recover_find_max_ids): ditto

* subversion/libsvn_fs_fs/transaction.c
  (rep_write_get_baton,
   write_hash_delta_rep): ditto

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1489804 13f79535-47bb-0310-9956-ffa450edef68