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

[Steve Dower]

Change by Steve Dower <steve.dower at python.org>:


----------
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33921>
_______________________________________