Roland C. Dowdeswell 3ea8da179a Fix renewal/refresh logic when kinit is provided with a command. ...

1.  in ticket_lifetime() calculate the remaining lifetime
	    of the ticket rather than the requested lifetime.

	2.  in renew_func(), attempt to renew if the tickets are
	    renewable rather than only if --renewable is specified.

	3.  fix the call to renew_validate() in renew_func() to
	    specify renewable tickets if the original tickets are
	    renewable rather than only if --renewable is specified.

	4.  stop printing constant warnings to the terminal about
	    how tickets cannot be obtained if they expire, cannot
	    be renewed and we can't non-interactively obtain fresh
	    ones.  We limit it to a single warning.

	5.  after the tickets expire, we backoff the requests to
	    obtain fresh tickets exponentially.

2012-10-17 01:32:43 +08:00

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