Update dependencies

vendor/github.com/tailscale/netlink/fou.go

@@ -0,0 +1,21 @@
+package netlink
+
+import (
+	"errors"
+)
+
+var (
+	// ErrAttrHeaderTruncated is returned when a netlink attribute's header is
+	// truncated.
+	ErrAttrHeaderTruncated = errors.New("attribute header truncated")
+	// ErrAttrBodyTruncated is returned when a netlink attribute's body is
+	// truncated.
+	ErrAttrBodyTruncated = errors.New("attribute body truncated")
+)
+
+type Fou struct {
+	Family    int
+	Port      int
+	Protocol  int
+	EncapType int
+}