Packet private data should hold all info to allow reconstructing original of invalid packets

[francois-normandin]

Current Packet Private Data does not hold the source bytes in a way that allow recreating the original incoming bytes if we detect an invalid packet format.

Packet should hold an original copy of the input stream instead of only caching the result of the decoding.
Use invalid packet type 00 to output invalid source stream when called.

In a nutshell, this is incorrect when the validation fails.