Three seqs

Refactor decode and skip

Updated the code to use more efficient and simpler interface:

In:  pointer to frame
In:  pointer to packet end
Out: pointer to the next frame (or end of packet)
     in case of errors: NULL (which ensures that it cannot be used after an error)

Report failed tests after the run

CI needs a fixed environment. Fix picotls at a know commit.

CI needs a fixed environment. Fix picotls at a know commit. A change to that commit will be its own PR and own CI run.

fix sizeof() in tls_api.c

Remove stream 0 references from picoquic_stream_network_input

simplify range functions

Draft 13

HRR, client auth and retry are broken and will require new implementation when new stack is ready.

Remove extra initialization?

Make picoquic build on Cygwin

This reverts commit c7946402.