can now avoid a second syscall if the ioctl() function can be used, or if the
non-blocking flag of the socket is unchanged.

Improve also wait() documentation: mention that the first parameter is a
sequence

Issue #19877: fix regression in test_pathlib when Windows has symlink support available (i.e. in administrator mode).
Patch by Vajrasky Kok.

already done by PyMODINIT_FUNC.

Example based on tcp_echo.py example from Tulip source code.

Remove also a duplicated Protocols section!

* complete create_connection() prototype
* link to Server
* document get_extra_info() keys

Patch by Vajrasky Kok.

indication for TLS/SSL connections.

indication for TLS/SSL connections.

indication for TLS/SSL connections.

indication for TLS/SSL connections.

Declare classes because they are mentionned in documentation of other functions