Update transport parameter for draft-12

[Yanmei-Liu]

As we have add new frame type PATH_CIDS_BLOCKED frame, we'd need a new transport parameter type.
BTW, as the transport parameter type is hex value, I used 0x0c for draft-12.

[mirjak]

yes, it's an hex value but I thought the intention was to map the last two values to the decimal revision number of the draft. At least that was my understanding of what we did so far, so let's not change this now.

[Yanmei-Liu]

yes, it's an hex value but I thought the intention was to map the last two values to the decimal revision number of the draft. At least that was my understanding of what we did so far, so let's not change this now.

As an engineer, I thought it would be strange to mix hex and decimal values together, a little bit tricky.
But it's not a major issue and I updated the last two values with "0x12", please have a look again!

[huitema]

We have been using hex values for QUIC version numbers for some time. See https://github.com/quicwg/base-drafts/wiki/QUIC-Versions. The convention was to use version number '0xFF0000xx' for the draft N, were 'xx' was the hexadecimal notation for n. For example, the version for draft-34 was '0xFF000022'.

I think we could just keep the '0c' value for draft 12.

[Yanmei-Liu]

According to @huitema 's comments, I keep the hex value version in this commit if we decide to keep it.

[mirjak]

Sure we can do one or the other but we have used the (decimal) draft version number so far, so why should we change it now?