Weird behavior on ticket renewal

[Matt Crawford]

> Regardless, if there's no reason to renew SGT's instead of just
> getting them all again, then there's obviously no point in looking
> into it any further.

Sure there's a reason.  I may wat to delegate a specific service
cred to some long-running process, but not delegate a TGS cred.

(Authentication of long running batch jobs is a hot topic right now
in the "Grid" world.)