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Convert a regular expression that can be captured multilingual nickname
Was this even tested? There are so many things that can go wrong from this PR, it's not even funny.
For reference, by the way, the RFC: http://tools.ietf.org/html/rfc2812#section-2.3.1
I believe this should be closed.
Sorry, I didn't know about that, this PR is useful only on networks that use non-ascii nickname.
You need to whitelist specific unicode ranges then - using .* cannot work as it permits specific characters which are significant to the protocol.