[tex-live] Bug#561836: please include revtex4 in addition to revtex4.1

[Karl Berry]

    If the class file is copied to revtex4.cls,
    files created with earlier versions of REVTeX 4 should still work.

Perhaps at some point we'll do that; I hope the APS will do that, so
we'll see what they do in their next release.

So for now, we'll have just the real revtex4 (as "revtex4") and the real
revtex4.1 (as "revtex").