quic-tls-work

Experiments and WIP based on projects:

• tls at commit 3727b12b

• quic at commit a32ac198

To do

• We could add a new TLSError constructor taking SomeException to hold a QUICError (or any other type the record layer wishes). This would restore the possibility for QUIC to throw negotation failures from quicRecv.

• See if it is possible to avoid repeating the TLS cipher in the SecretInfo data types. Similarly, handshake mode and negotiated protocol could be available from the TLS context through API.

• More generic interface to insert/extract some content in TLS extensions. Could be applicable to TLS < 1.3 as well. And to all message types.

• See if a better design can be found for polymorphic RecordLayer, to avoid repetition with Content and RecordLayer arguments some functions need.