[Python-ideas] PEP 540: Add a new UTF-8 mode

[INADA Naoki]

>
> Of course.  The question is not "should cb at noaa properly configure
> docker?", it's "Can docker properly configure docker (soon enough)?
> And if not, should we configure Python?"  The third question depends
> on whether fixing it for you breaks things for others.

When talking about general Docker image, using C locale is OK for most cases.
In other words, images using C locale is properly configured.
All of node.js, Ruby, Perl, Go and Rust application can talk UTF-8 in docker
using C locale, without special configuration.
Locale dependent application is very special in this area.