Signer's User ID

In 2440bis-03, the "Signer's User ID" signature subpacket is
discussed, but no way to describe the data itself is included.

I assume this is meant to be a string (like the User ID), so it might
be good to have a "(String)" in there.

David

-- 
David Shaw          |  Technical Lead
<dshaw(_at_)akamai(_dot_)com>  |  Enterprise Content Delivery
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