Doc: Clusters from Scratch: Fix netmask in ClusterIP example.
Following the documentation, with netmask=32 the cluster IP will
eventually drop, likely after ten or fifteen minutes when you've stopped
paying attention, due to an error from findif.
There are two possible solutions. First, you can use netmask=32
nic=eth0 (or whatever your network device is). Second, you can use
netmask=24 by itself. I've gone with the latter here because it's less
stuff for people to do.