Stabilize mod_dav_svn URLs so that unedited copied subtree items always claim the same "created rev" (for version resource URL purposes and such) as the revision in which their copy was created.  This is a major boost to the cache-ability of DAV version resource URLs.
Stabilize mod_dav_svn URLs so that unedited copied subtree items
always claim the same "created rev" (for version resource URL purposes
and such) as the revision in which their copy was created.  This is a
major boost to the cache-ability of DAV version resource URLs.

* subversion/mod_dav_svn/util.c
  (get_last_history_rev): New.
  (dav_svn_get_safe_cr): Use get_last_history_rev() instead of
    svn_fs_node_created_rev().

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@846838 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion