coreos/etcd — pull request #1863 by xiang90 (2014-12-05 01:11:15+00:00)
Title: etcdmain: format usage

Fix #1649

Follow the go cmd style and our doc at https://github.com/coreos/etcd/blob/master/Documentation/0.5/configuration.md

do we still want to print out the deprecated flags?

/cc @bcwaldon @jonboulle