forked from github/multus-cni
When configuring `clsuterNetwork` in Multus CNI config, the value for `clusterNetwork` needs to match the value for `name` key in the file `clusterNetwork` setting refers to. This condition is undocumented in doc/configuration.md. This PR adds description on the condition for users to understand `clusterNetwork` config more clearly. Signed-off-by: Sho SHIMIZU <sho.shimizu@gmail.com>