Avahi/mdns config

Add the required useflags:

echo "net-dns/avahi mdnsresponder-compat" >> /etc/portage/package.use

Then, emerge the required packages:

emerge net-dns/avahi sys-auth/nss-mdns

Next, edit /etc/nsswitch.conf so the host line looks like this

hosts:       files dns mdns4_minimal [NOTFOUND=return] mdns4 wins

And finally add the avahi-daemon service to the startup and start it

rc-update add avahi-daemon default && /etc/init.d/avahi-daemon start