Switch to using libnetwork's resolvconf package

Libnetwork provides a well-tested package for generating
resolv.conf from the host's that has some features our current
implementation does not. Swap to using their code and remove our
built-in implementation.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/vendor/github.com/docker/libnetwork/README.md b/vendor/github.com/docker/libnetwork/README.md
new file mode 100644
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--- /dev/null
+++ b/vendor/github.com/docker/libnetwork/README.md
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+# libnetwork - networking for containers
+
+[![Circle CI](https://circleci.com/gh/docker/libnetwork/tree/master.svg?style=svg)](https://circleci.com/gh/docker/libnetwork/tree/master) [![Coverage Status](https://coveralls.io/repos/docker/libnetwork/badge.svg)](https://coveralls.io/r/docker/libnetwork) [![GoDoc](https://godoc.org/github.com/docker/libnetwork?status.svg)](https://godoc.org/github.com/docker/libnetwork)
+
+Libnetwork provides a native Go implementation for connecting containers
+
+The goal of libnetwork is to deliver a robust Container Network Model that provides a consistent programming interface and the required network abstractions for applications.
+
+#### Design
+Please refer to the [design](docs/design.md) for more information.
+
+#### Using libnetwork
+
+There are many networking solutions available to suit a broad range of use-cases. libnetwork uses a driver / plugin model to support all of these solutions while abstracting the complexity of the driver implementations by exposing a simple and consistent Network Model to users.
+
+
+```go
+func main() {
+	if reexec.Init() {
+		return
+	}
+
+	// Select and configure the network driver
+	networkType := "bridge"
+
+	// Create a new controller instance
+	driverOptions := options.Generic{}
+	genericOption := make(map[string]interface{})
+	genericOption[netlabel.GenericData] = driverOptions
+	controller, err := libnetwork.New(config.OptionDriverConfig(networkType, genericOption))
+	if err != nil {
+		log.Fatalf("libnetwork.New: %s", err)
+	}
+
+	// Create a network for containers to join.
+	// NewNetwork accepts Variadic optional arguments that libnetwork and Drivers can use.
+	network, err := controller.NewNetwork(networkType, "network1")
+	if err != nil {
+		log.Fatalf("controller.NewNetwork: %s", err)
+	}
+
+	// For each new container: allocate IP and interfaces. The returned network
+	// settings will be used for container infos (inspect and such), as well as
+	// iptables rules for port publishing. This info is contained or accessible
+	// from the returned endpoint.
+	ep, err := network.CreateEndpoint("Endpoint1")
+	if err != nil {
+		log.Fatalf("network.CreateEndpoint: %s", err)
+	}
+
+	// Create the sandbox for the container.
+	// NewSandbox accepts Variadic optional arguments which libnetwork can use.
+	sbx, err := controller.NewSandbox("container1",
+		libnetwork.OptionHostname("test"),
+		libnetwork.OptionDomainname("docker.io"))
+	if err != nil {
+		log.Fatalf("controller.NewSandbox: %s", err)
+	}
+
+	// A sandbox can join the endpoint via the join api.
+	err = ep.Join(sbx)
+	if err != nil {
+		log.Fatalf("ep.Join: %s", err)
+	}
+
+	// libnetwork client can check the endpoint's operational data via the Info() API
+	epInfo, err := ep.DriverInfo()
+	if err != nil {
+		log.Fatalf("ep.DriverInfo: %s", err)
+	}
+
+	macAddress, ok := epInfo[netlabel.MacAddress]
+	if !ok {
+		log.Fatalf("failed to get mac address from endpoint info")
+	}
+
+	fmt.Printf("Joined endpoint %s (%s) to sandbox %s (%s)\n", ep.Name(), macAddress, sbx.ContainerID(), sbx.Key())
+}
+```
+
+## Future
+Please refer to [roadmap](ROADMAP.md) for more information.
+
+## Contributing
+
+Want to hack on libnetwork? [Docker's contributions guidelines](https://github.com/docker/docker/blob/master/CONTRIBUTING.md) apply.
+
+## Copyright and license
+Code and documentation copyright 2015 Docker, inc. Code released under the Apache 2.0 license. Docs released under Creative commons.