Remove all darwin specific files and use more generic _unsupported with build tags.

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)

netlink/netlink_unsupported.go

@@ -0,0 +1,32 @@
+// +build: !linux !amd64
+package netlink
+
+import (
+	"fmt"
+	"net"
+)
+
+func NetworkGetRoutes() ([]Route, error) {
+	return nil, fmt.Errorf("Not implemented")
+}
+
+func NetworkLinkAdd(name string, linkType string) error {
+	return fmt.Errorf("Not implemented")
+}
+
+func NetworkLinkUp(iface *net.Interface) error {
+	return fmt.Errorf("Not implemented")
+}
+
+func NetworkLinkAddIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
+	return fmt.Errorf("Not implemented")
+}
+
+func AddDefaultGw(ip net.IP) error {
+	return fmt.Errorf("Not implemented")
+
+}
+
+func NetworkSetMTU(iface *net.Interface, mtu int) error {
+	return fmt.Errorf("Not implemented")
+}