dummy build on windows; move code

dhcpd/v46_windows.go

@@ -0,0 +1,45 @@
+package dhcpd
+
+import "net"
+
+type winServer struct {
+}
+
+func (s *winServer) ResetLeases(leases []*Lease) {
+}
+func (s *winServer) GetLeases(flags int) []Lease {
+	return nil
+}
+func (s *winServer) GetLeasesRef() []*Lease {
+	return nil
+}
+func (s *winServer) AddStaticLease(lease Lease) error {
+	return nil
+}
+func (s *winServer) RemoveStaticLease(l Lease) error {
+	return nil
+}
+func (s *winServer) FindMACbyIP(ip net.IP) net.HardwareAddr {
+	return nil
+}
+
+func (s *winServer) WriteDiskConfig4(c *V4ServerConf) {
+}
+func (s *winServer) WriteDiskConfig6(c *V6ServerConf) {
+}
+
+func (s *winServer) Start() error {
+	return nil
+}
+func (s *winServer) Stop() {
+}
+func (s *winServer) Reset() {
+}
+
+func v4Create(conf V4ServerConf) (DHCPServer, error) {
+	return &winServer{}, nil
+}
+
+func v6Create(conf V6ServerConf) (DHCPServer, error) {
+	return &winServer{}, nil
+}