(do_dir_replaces, process_subdirectory): add pool argument, and start   using svn_wc__get_ancestry everywhere we need it.
(do_dir_replaces, process_subdirectory): add pool argument, and start
  using svn_wc__get_ancestry everywhere we need it.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion