On the log-addressing branch:
Switch packing code to using the new revision file API.

* subversion/libsvn_fs_fs/pack.c
  (pack_range,
   append_revision): use revision file struct instead of plain APR files


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/log-addressing@1532021 13f79535-47bb-0310-9956-ffa450edef68