[php-src] Issue #8308: The return value of mb_list_encodings() doesn't contain 'SJIS-win'

Issue: https://github.com/php/php-src/issues/8308 Comment Author: sj-i Depending on how the document is generated, such as the conversion table used to convert a document from legacy encoding to Unicode, which code point is intended to represent which character can change. When such a document is further converted to the same or another legacy encoding, the conversion method required will depend on the intended use. There are conversion tables with different policies for handling U+00A5 and U+203E, so you can choose which one you imagine would work best for your use case. That's all we can talk about if we try to choose an encoding reasonably.