Some of the East Asian codepages, such as shift_jis, do not map U+005C
and instead map into \x5C a 'Yen' character. This is not the behavior of web
browsers, and leaves that encoding with no way to represent a backslash.
I'm requesting that variant codepages, with no backslash, be created and put
the ICU. It would be possible to simply modify convtrs.txt [instance|for] to
point to these versions when they are needed.
[ Understanding that sjis intentionally maps \x5C as Yen, however U+005C
could be mapped to the fullwidth yen for display purposes in these variant