ssh-keygen: sanitize ANSI escape sequences in key comment

[Roland Hieber]

On 04.01.2016 08:29, Damien Miller wrote:
> No problem :) Could I ask you to file a bug at https://bugzilla.mindrot.org/ ?
> 
> I think we should use strnvis* with VIS_SAFE|VIS_OCTAL flags instead of
> explicit white/blacklists of characters.

Thanks, I didn't know about strvis() yet, but it does what I want :)
The new patch is at https://bugzilla.mindrot.org/show_bug.cgi?id=2520

 - Roland

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