[Hipsec] Please refresh my memory on HIP_SIGNATURE in UPDATE

Robert Moskowitz <rgm@htt-consult.com> Sun, 18 September 2016 18:29 UTC

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From: Robert Moskowitz <rgm@htt-consult.com>
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Date: Sun, 18 Sep 2016 19:19:40 +0100
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Subject: [Hipsec] Please refresh my memory on HIP_SIGNATURE in UPDATE
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I cannot remember why we mandated HIP_SIGNATURE in UPDATE packet, 
particularly when we have the HIP_MAC.  Sec 5.3.5 in 7401.

I am sure we had a good reason, but I am not finding it....

thanks

Bob