"beginning of whois" and "end of whois" events is now printed as
whois_special. Removed whois_registered and whois_help, they're printed with
whois_special as well.
git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3263 dbcabf3a-b0e7-0310-adc4-f8d773084564