change "today" IRC links from perlgeek to shortcircuit

http://irclogs.shortcircuit.net.au/%23crimsonfu/2018-06-06.log.html is the first day of logs on the new service.

We should update all links from http://irclog.perlgeek.de/crimsonfu/today to http://irclogs.shortcircuit.net.au/%23crimsonfu/latest.log.html