Remove expired ports:
2015-04-30 www/p5-Google-Code-Upload: Google Code will be shutting down (http://google-opensource.blogspot.tw/2015/03/farewell-to-google-code.html)
2015-04-30 net/ntp-rc: Upline no longer has RC branch.
2015-04-30 games/wmfortune: Broken for more than 6 months
2015-04-30 games/springlobby: Depends on expiring games/spring
2015-04-30 devel/p5-base: this port is outdated and base 2.18+ is already in all supported Perl releases