Update to 1.34, fixes various upstream bugs:
    Rekey properly after 1 GB of data (rt.cpan.org #25044)
    Don't try to process nonexistent or empty auth file (rt.cpan.org #41877)
    Fix typo in croak message (rt.cpan.org #42056)
    Move 'use base' call after Crypt module loading (rt.cpan.org #42051)
    Only apply stdin if defined in SSH1 (rt.cpan.org #42583)