Extract OID length field for "Country" and "OrganizationalUnit"

[thiezn]

The Country and OrganizationalUnit templates used the OID Length field inside the OID definition. This pull request removes the OID length field from the OID field and places it before the OID field. This is more consistent with other fields like the "Common Name"

Thanks for the great visualisation of the TLS1.2 connection. Must have taken quite some time to build these. IEEE should fund you to do this for all sort of other protocols!

[thiezn]

I also noticed your homepage https://xargs.org/ only provides links to:

• The Animated Elliptic Curve
• The Illustrated TLS 1.3 Connection
• The Illustrated QUIC Connection

You are robbing people of your other great work on: dtls.xargs.org tls12.xargs.org x25519.xargs.org