[krbdev.mit.edu #7871] KDC should not fail requests due to forwardable/proxiable option

[Tom Yu via RT]

[ghudson - Thu Mar 27 21:03:07 2014]:

> [tlyu - Thu Mar 27 17:07:28 2014]:
> > Do we have confirmation that Windows issues tickets with the policy-
> > denied flags cleared rather than rejecting the request?
> 
> That's my memory from the last interop event.  I don't have a written
> reference.


Silently declining to fulfill requested options like this might allow us to forgo the weird hack with 
validate_forwardable() in kdc_util.c.