Import /usr/local/bin/nagios-oftc-check-irc

... unmodified since 2006
Import /etc/nagios-plugins/config/local-oftc-checkcommands.cfg
Import /usr/local/bin/nagios-check-tcp-ircsserver

... from 2006
nagios-check-shedding: Add -p
Import /etc/oftc/nagios/build-nagios-ircds
Add pseudo hosts for ipv6, add ircd-ip hostgroup
oftc-overview: skip ipv6 pseudo hosts
shedding-check.rb: grab server version
add oftc_check_ircd_version
Pass -v from oftc_check_ircd_version
shedding-check: actually emit WARNING for version mismatch