[Isms] fingerprint TCs and hash types

[Wes Hardaker <wjhns1 at hardakers.net>]

After doing research about what other fingerprinting / hash textual
conventions were out there, I found none.  Which surprised me.  The end
result was there was nothing to reuse, so we do need to define our own.

The -00 version of the document defines 2 TCs for "fingerprints"
(FingerprintType and FingerprintValue).  These are worded generically so
they can be reused elsewhere easily.

The biggest question, as I was defining the TCs, was what type of data
the FingerprintType should be.  Originally in the personal versions of
the draft, it was an integer.  But it's highly likely that many other
hashing algorithms will be defined in the future, especially with the
NIST hashing algorithm "contest" going on right now.  So we certainly
need something with agility.  In the end, I changed the FingerprintType
to a OID instead.

Note that in our MIBs at least, it's not being used as an index so we
don't have issues with the length restrictions it would impose on MIB
objects.  I could easily see other MIBs wanting to put it in an INDEX
though.

Feedback on these resulting TCs is greatly appreciated.

-- 
Wes Hardaker
Cobham Analytic Solutions