This reverts commit 84fcda95.

    - add golang-github-go-ini-ini-dev as build-depends.
    - patch discovery.go to read from /etc/etcd-discovery/etcd-discovery.conf.
    - package a default /etc/etcd-discovery/etcd-discovery.conf.

fix etc-discovery as init script name.

Merge branch 'debian/train' of ssh://salsa.debian.org/openstack-team/third-party/golang-github-coreos-discovery-etcd-io into debian/train

This PR is an update to #53 bumping etcd to v3.3.9 and go 1.10.3. Although dep will be replaced with vgo in the future keeping the tooling in sync with etcd with make management easier.

Preliminary work towards https://github.com/coreos/discovery.etcd.io/issues/52.

Goal is having good test coverage on current code base, so that we can safely migrate to etcd v3. This does not change any client-facing interface (etcd v2). Highlighted changes are:

- [X] Update vendors with latest etcd release, sync other upstream dependencies
- [X] Remove test files in `vendor`
- [X] Use Go 1.8.3 (required for integration tests with latest etcd)
  - Go 1.6<= won't build, Go 1.7<= will build but fail in CI
- [X] Change Go version to 1.8.3 in `Dockerfile`
- [X] Share states between handlers with context, **for integration testing** (avoids global vars)
- [X] Remove `pkg/lockstring`, instead have mutex inside shared states between handlers
- [X] Add handler integration tests with embedded etcd (available since v3.1)
- [X] Add e2e tests with actual etcd cluster and discovery.etcd.io builds
- [X] Set up CIs

automated PR: update CoC and legalese

make link a link

Working dockerfile

add parsing of etcd and host arguments

based on https://github.com/coreos/discovery.etcd.io/pull/27

allow configuration of etcd host, discovery.etcd.io host