[Python-ideas] Support WHATWG versions of legacy encodings

[Stephen J. Turnbull]

Nick Coghlan writes:

 > Personally, I think a See Also note pointing to ftfy in the "codecs"
 > module documentation would be quite a reasonable outcome of the thread

Yes please.  The more I hear about purported use cases (with the
exception of Nathaniel's "don't crash when I manipulate the DOM" case,
which is best handled by errors='surrogateescape'), the less I see
anything "standard" about them.