Properly detect if we should really handle a parent stub to prepare for when we don't have parent stubs.
Properly detect if we should really handle a parent stub to prepare for
when we don't have parent stubs.

* subversion/libsvn_wc/wc_db.c
  (svn_wc__db_op_copy_dir,
   svn_wc__db_op_add_directory): Detect empty local_relpath before looking
     for a parent stub.
  (svn_wc__db_temp_op_remove_entry): Remove entry in the right place and
     maybe in the parent stub. Implement what we should do, instead of just
     documenting what we should do.

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