- websocket supports cancellation.
- Iterating test for ws cancellation.
- Only terminal cancellation is forwarded by default.
- basic_stream supports cancellation.
- supported cancellation is documented.
- http cancellation additions.
- Added cancellation_slot tests to http, utils and saved_handler.
- Added post to write.cpp, to avoid SIGSEV in test.
- Refresher describes cancellation in more detail.
`asio::spawn` is an extension, which is not part of
the Networking TS, so the `net` alias is not appropriate in this case.
Signed-off-by: Damian Jarek <damian.jarek93@gmail.com>
