RFR: 8252523: Add ASN1 Formatter to work with HexPrinter [v2]

[Roger Riggs]

On Tue, 29 Sep 2020 19:35:42 GMT, Jamil Nimeh <jnimeh at openjdk.org> wrote:

> Regarding the end-of-content identifier, that looks good. Thanks for fixing the indentation for the right-side ASN.1
> interpretation of the bytes. My only remaining question is whether the corresponding hex dumps on the left should match
> the indentation levels as well. I don't have a strong opinion either way on that one but if you're indenting for each
> element at the same nest level it seems like that could potentially chew up a lot of horizontal space. Was the extra
> indentation for the second octet string done for readability?

Max had requested the current offset of the byte values, so it was easy to see where each new value started and to keep
the offsets on a modulo boundary.  The formatter on the right is largely decoupled from the hex value tabular form on
the left while keeping the correspondence between the formatted items and the bytes.

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PR: https://git.openjdk.java.net/jdk/pull/268