handle the multideref op, and to a limited extent the UNOP_AUX op class in general. [CPAN #102911]
As of eacbb37937698a03 (v5.21.6), can't call CvPADLIST on an XSUB. More usefully, the slot is now used for XS versioning protection, which means that we can be confident that nothing out there is using it for data. Reported as [CPAN #102909].
Avoid t/recurse.t failing because Test::More::is() has been refactored and is now larger than it was. [CPAN #102910].
Changes for version 0.79_51 - 2015-02-28
as of 5.20.0, s/// is no longer a reliable test for OOK [CPAN #95493]