[docs] [issue33921] Explain that '' can be used to bind to all interfaces for the AF_INET address family in the docs

Ammar Askar <ammar@ammaraskar.com> added the comment: It's kinda mentioned: "For IPv4 addresses, two special forms are accepted instead of a host address: the empty string represents INADDR_ANY" Though it could be more explicit on what means since binding to all interfaces is a common use case. ---------- nosy: +ammar2 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue33921> _______________________________________