* subversion/include/private/svn_fs_util.h   (svn_fs__identifier): Document why the UUID is used.
* subversion/include/private/svn_fs_util.h
  (svn_fs__identifier): Document why the UUID is used.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1331305 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion