Preparation for fixing issue #1809: replace svn_client_ls and make recursive ls streamy.
Preparation for fixing issue #1809: replace svn_client_ls and
make recursive ls streamy.

* subversion/libsvn_client/ls.c (svn_client_ls4): Use svn_ra_stat()
  and fall back to the old method of using svn_ra_check_path and
  svn_ra_get_dir in the file case if necessary.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@858241 13f79535-47bb-0310-9956-ffa450edef68

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