The `utils` module uses a convoluted mechanism for filling byte arrays
with random data. The `generate` function can be used directly, making
the `utils` module obsolete.
* moving files around
* wip
* wip
* move tls example into server example
* add tls functionality
* rename
* rename
* fix tests
* move extension related files to own folder
* use trace instead of debug
* export extensions
* rework partial frame handling and closing
* rework status codes as distincts
* logging
* re-enable extensions processing for frames
* enable all test for non-tls server
* remove tlsserver
* remove offset to mask - don't think we need it
* pass sessions extensions when calling send/recv
* adding encode/decode extensions flow test
* move server/client setup to helpers
* proper frame order execution on decode
* fix tls tests
