Update Windows support.

vendor/github.com/hashicorp/go-sockaddr/ifaddrs_windows.go

@@ -1,9 +1,6 @@
 package sockaddr
 
-import (
-	"errors"
-	"os/exec"
-)
+import "os/exec"
 
 // defaultWindowsIfNameCmd is the comamnd to run on Windows to get the default
 // interface.
@@ -20,23 +17,22 @@ func defaultWindowsIPConfigCmd() []string {
 // getDefaultIfName is a Windows-specific function for extracting the name of
 // the interface from `netstat -rn` and `ipconfig`.
 func getDefaultIfName() (string, error) {
-	ipAddr, err := getWindowsIPOnDefaultRoute()
-	if err != nil {
-		return "", err
-	}
-	return ipAddr, nil
-}
-
-func getWindowsIPOnDefaultRoute() (string, error) {
 	var cmd []string = defaultWindowsIfNameCmd()
-	out, err := exec.Command(cmd[0], cmd[1:]...).Output()
+	ifNameOut, err := exec.Command(cmd[0], cmd[1:]...).Output()
 	if err != nil {
 		return "", err
 	}
 
-	var defaultIPAddr string
-	if defaultIPAddr, err = parseDefaultIPAddrWindowsRoute(string(out)); err != nil {
-		return "", errors.New("No IP on default route found")
+	cmd = defaultWindowsIPConfigCmd()
+	ipconfigOut, err := exec.Command(cmd[0], cmd[1:]...).Output()
+	if err != nil {
+		return "", err
 	}
-	return defaultIPAddr, nil
+
+	ifName, err := parseDefaultIfNameWindows(string(ifNameOut), string(ipconfigOut))
+	if err != nil {
+		return "", err
+	}
+
+	return ifName, nil
 }

vendor/vendor.json

@@ -420,10 +420,10 @@
 			"revisionTime": "2016-09-30T03:51:02Z"
 		},
 		{
-			"checksumSHA1": "wGgPqc+2Lwn6qbDjM15SLKktd+Y=",
+			"checksumSHA1": "LmCRW89WaBzau5RaVIhx8QHwLYo=",
 			"path": "github.com/hashicorp/go-sockaddr",
-			"revision": "3fe949359e7faa30c9dc5b4f921c7beddba1a27c",
-			"revisionTime": "2016-12-02T06:02:17Z"
+			"revision": "33afa667d8f9a6ca9d435a8f8c6e87af423c9356",
+			"revisionTime": "2016-12-02T07:02:37Z"
 		},
 		{
 			"checksumSHA1": "Y+c+ahUug8/vK+cWRLatV5aB4ps=",