etcdserver: use member instead of node at etcd level
Merge pull request #1694 from xiang90/use_member

etcdserver: use member instead of node at etcd level
raft: add comment string for TestNodeStart
Merge pull request #1695 from xiang90/nodestart

raft: add comment string for TestNodeStart
etcdserver: ensure initial-advertise-peer-urls match initial-cluster

This adds a check to setupCluster to ensure that the list of URLs
specified in `initial-advertise-peer-urls` matches those configured in
`initial-cluster` for this node. Also updates the documentation to
clarify this and address some changes in wording.
etcdserver: move peer URLs check to config
integration: fix test to propagate NewServer errors
integration: remove unnecessary t.Testing argument
Merge pull request #1676 from jonboulle/doc_initial_cluster

etcdserver: validate and document initial-advertise-peer-urls
integration: add increase cluster size test