On the fsx-id branch:

* subversion/libsvn_fs_x/dag.c
  (svn_fs_x__dag_txn_root,
   svn_fs_x__dag_clone_root): Simplify as txn root noderev-ID can be
                              constructed directly from the txn-ID.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsx-id@1647759 13f79535-47bb-0310-9956-ffa450edef68