get_io_context() deprecation makes ssl::stream construction from moved socket impossible

[vinniefalco]

The following behavior cannot be implemented without using deprecated interfaces:

void make_stream(asio::ip::tcp::socket sock, asio::ssl::context& ctx)
{
    asio::ssl::stream<asio::ip::tcp::socket> ss{sock.get_io_context(), ctx};
    ss.next_layer() = std::move(sock);

    ...

[vinniefalco]

This is a specific case of a general problem. You can't construct a new socket that uses the io_context of an existing socket without calling get_io_context, which is deprecated. And there is no socket constructor which accepts an io_context::executor_type.

[vinniefalco]

Hmm... get_executor().context() seems to work in place of get_io_service().