I've add this port as a 'new' port, even though we already have
ports/irc/keitairc, keitairc 1.x. Because...
- keitairc 2.x is a _complete_ rewrite of keitairc 1.x
keitairc 1.x is just a single perl script, but keitairc 2.x
is composed of a script, Keitairc perl module, templates, etc.
Also there is no configuration file compability between 1.x and 2.x.
- keitairc 2.x port is a _complete_ rewrite of keitairc 1.x
Since the application structure is changed, I have to write
a new port for 2.x, instead of _modify_ 1.x port.
Tested by: nork
