[Merge] lp:~vorlon/update-notifier/lp.876298 into lp:update-notifier

[Steve Langasek]

> Could be written as something like:
> + return glob.glob(STAMPDIR+"*.permanent-failure")

We do want to strip off the extension and directory name, though, to get just the name of the hook that's failed.  So in the end, I'm not sure this is shorter/cleaner?

Committed the other two suggestions, thanks!
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https://code.launchpad.net/~vorlon/update-notifier/lp.876298/+merge/98487
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~vorlon/update-notifier/lp.876298 into lp:update-notifier.