irssi/scripts.irssi.org — pull request #19 by msparks (2014-07-01 08:05:42+00:00)
Title: nickserv.pl: allow unbounded-length usernames.

Some ircds, namely unrealircd, allow the username to be 10
characters. RFC 2812 does not seem to specify the maximum length of
usernames.

+@GeertHauwaerts