RFC - support for subjectUniqueID and issuerUniqueID

[Brad Hards]

Hi,

During investigation into some windows protocols, we've found that windows 
servers create certificates that make use of the subjectUniqueID and 
issuerUniqueID fields. They seem to contain GUID values.

The attached patch (which I'm looking for feedback on, not to be applied at 
this stage) allows fetching / display of those fields. I have a second patch 
for setting / writing those fields, but I haven't tested it yet. A sample 
certificate is also attached.

I recognise that they aren't normally used (and are deprecated), but for 
interop purposes, I'd like to be able to access them if necessary.

Thoughts and comments?

Brad

0001-Add-support-for-issuerUniqueID-and-subjectUniqueID.patch
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cert
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