On the revprop-caching-ng branch:
Update FSFS structure doc.  No functional change.

* subversion/libsvn_fs_fs/structure
  (Layout): Add revprop-generation file.
  (Revision property generation): New section describing the file contents.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/revprop-caching-ng@1620358 13f79535-47bb-0310-9956-ffa450edef68