I don't think the patch should currently be committed.
I agree with Terry: we should first fix the issue whereby the key config is read repeatedly. Given such a fix, the problematic "known_invalid" workaround in the patch would no longer be necessary.
As a side note, I think the method used in the patch to check if a binding is good. Ideally it would be the final check done after a simpler syntax check, since a syntax check could give more informative error messages.
Also, there are two other more technical issues with the patch; I mentioned them in the patch review system.