ssh: case insensitive fingerprint validation

[Thorsten Glaser]

On Tue, 8 Sep 2020, Patrik Lundin wrote:

> I'm just curious if this was a deliberate decision or if it would make
> sense to actually care about the case since the base64 encoded sha256
> fingerprints contains a mix of upper and lower case characters.

Probably a leftover from the MD5 fingerprints, which are hex.
I guess the code should check which kind of fingerprint it is
first then compare based on that.

bye,
//mirabilos
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