[Bug 2058] SSH Banner message displays UTF-8 multibyte char incorrrectly

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2058

--- Comment #6 from Damien Miller <djm at mindrot.org> ---
I think a reasonable answer is to decide whether the user's terminal is
UTF-8 capable (probably using $TERM, locale and/or platform) and, if
so, prepare the strings for display using stringprep
(http://www.ietf.org/rfc/rfc3454.txt)

For everything else, continue to use strnvis(3)

I have the beginnings of a minimal stringprep implementation, but I'll
need some guidance on how to reliably decide whether UTF-8 is safe for
output (or some way to render it for the user's current terminal).

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