Add revprop packing support to pack and recovery functions.
Add revprop packing support to pack and recovery functions.

* subversion/libsvn_fs_fs/fs_fs.c
  (packed_revprop_available: new function
  (recover_body): call new function to handle packed revprops
  (copy_revprops,
   pack_revprops_shard,
   delete_revprops_shard): new functions
  (pack_shard): call new functions to handle packed revprops;
   add revprop-specific arguments to signature
  (pack_body): read repo config and pass settings to next level

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