This is done, as of r12825. - All TPF copyrights are now marked as:
Copyright (C) <years>, The Perl Foundation. - All YAS copyrights and Leo copyrights are now listed as TPF. There are still non TPF copyrights in the repository, and many of these are still marked as 'All Rights Reserved'; I think a decision should be made about these items on a case by case basis: some of these files are copied wholesale into the repo, and therefore should retain their original copyright. Others were probably implicitly transferred to TPF when committed.
