Document Certificate Requirements

[sdodson]

I'm getting bad certificate errors when I try to enable peer SSL. Can you guys please document the certificate requirements for peer ssl?

Currently I have certs that have CN=10.10.10.1 I don't know if it's failing because the CN doesn't match the ETCD_NAME=test.example.com or if its because the X509v3 Extended Key Usage: TLS Web Server Authentication rather than TLS Web Server Authentication, TLS Web Client Authentication as created by etcd-ca.

Note: I'm not using etcd-ca to create the certs as I have existing CA creation scripts/tools.