Because I searched for it now for half an hour and could only find it in the Google cache.
Irssi proxy usage:
First you’ll need to have the proxy module installed, either configure
irssi with –with-proxy and do make install, or manually:
cd src/irc/proxy
make
mkdir ~/.irssi/modules
cp .libs/libproxy.so ~/.irssi/modules/
In irssi, say:
/LOAD proxy
You really should set some password for the proxy with:
/SET irssiproxy_password secret
Then you’ll need to configure the ports/ircnets the proxy listens in, something like:
/SET irssiproxy_ports ircnet=2777 efnet=2778 freenode=2779
There we have 3 different irc networks answering in 3 ports. Note that you’ll have to make the correct /IRCNET ADD and /SERVER ADD commands to make it work properly.